CMIS not syncronizing with Alfresco 4

Hi
CMIS was working very well with Alfresco 3.4.e and 3.4.d

But with Alfresco 4 , initially i was able to connect and make it work but this week I get the following error .
HTTP call to [http://xxx/alfresco/s/cmis/queries] returned [500]. Response: Web Script Status 500 - Internal Error Web Script Status 500 - Internal Error The Web Script /alfresco/s/cmis/queries has responded with a status of 500 - Internal Error. 500 Description: An error inside the HTTP server which prevented it from fulfilling the request.   Message:09240003 Wrapped Exception (with status template): 09240047 Error during processing of the template 'get(properties) failed on instance of org.alfresco.repo.template.TemplateNode'. Please contact your system administrator.   Exception:org.alfresco.service.cmr.repository.InvalidNodeRefException - Node does not exist: missing://missing/missing   org.alfresco.repo.node.db.DbNodeServiceImpl.getNodePairNotNull(DbNodeServiceImpl.java:175) org.alfresco.repo.node.db.DbNodeServiceImpl.hasAspect(DbNodeServiceImpl.java:957) sun.reflect.GeneratedMethodAccessor230.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) org.alfresco.repo.tenant.MultiTNodeServiceInterceptor.invoke(MultiTNodeServiceInterceptor.java:104) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) $Proxy8.hasAspect(Unknown Source) sun.reflect.GeneratedMethodAccessor230.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.alfresco.repo.service.StoreRedirectorProxyFactory$RedirectorInvocationHandler.invoke(StoreRedirectorProxyFactory.java:215) $Proxy9.hasAspect(Unknown Source) org.alfresco.repo.node.MLPropertyInterceptor.getPivotNodeRef(MLPropertyInterceptor.java:321) org.alfresco.repo.node.MLPropertyInterceptor.invoke(MLPropertyInterceptor.java:171) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.alfresco.repo.node.NodeRefPropertyMethodInterceptor.invoke(NodeRefPropertyMethodInterceptor.java:212) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.alfresco.repo.node.NodeRefPropertyMethodInterceptor.invoke(NodeRefPropertyMethodInterceptor.java:212) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) $Proxy8.getProperties(Unknown Source) sun.reflect.GeneratedMethodAccessor303.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) org.alfresco.repo.audit.DisableAuditableBehaviourInterceptor.invoke(DisableAuditableBehaviourInterceptor.java:100) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) net.sf.acegisecurity.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:80) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:44) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:146) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) $Proxy8.getProperties(Unknown Source) org.alfresco.repo.template.TemplateNode.getProperties(TemplateNode.java:249) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:870) freemarker.ext.beans.BeanModel.invokeThroughDescriptor(BeanModel.java:277) freemarker.ext.beans.BeanModel.get(BeanModel.java:184) freemarker.core.Dot._getAsTemplateModel(Dot.java:76) freemarker.core.Expression.getAsTemplateModel(Expression.java:89) freemarker.core.Dot._getAsTemplateModel(Dot.java:74) freemarker.core.Expression.getAsTemplateModel(Expression.java:89) freemarker.core.DefaultToExpression._getAsTemplateModel(DefaultToExpression.java:100) freemarker.core.Expression.getAsTemplateModel(Expression.java:89) freemarker.core.Expression.getStringValue(Expression.java:93) freemarker.core.DollarVariable.accept(DollarVariable.java:76) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IfBlock.accept(IfBlock.java:82) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.visit(Environment.java:406) freemarker.core.BodyInstruction.accept(BodyInstruction.java:93) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Macro$Context.runMacro(Macro.java:172) freemarker.core.Environment.visit(Environment.java:614) freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Macro$Context.runMacro(Macro.java:172) freemarker.core.Environment.visit(Environment.java:614) freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:167) freemarker.core.Environment.visit(Environment.java:428) freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.visit(Environment.java:310) freemarker.core.CompressedBlock.accept(CompressedBlock.java:73) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.process(Environment.java:199) org.alfresco.repo.template.FreeMarkerProcessor.process(FreeMarkerProcessor.java:202) org.springframework.extensions.webscripts.AbstractWebScript.renderTemplate(AbstractWebScript.java:714) org.springframework.extensions.webscripts.DeclarativeWebScript.renderFormatTemplate(DeclarativeWebScript.java:267) org.springframework.extensions.webscripts.DeclarativeWebScript.execute(DeclarativeWebScript.java:147) org.alfresco.repo.web.scripts.RepositoryContainer$2.execute(RepositoryContainer.java:393) org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:388) org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecute(RepositoryContainer.java:462) org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecuteAs(RepositoryContainer.java:500) org.alfresco.repo.web.scripts.RepositoryContainer.executeScript(RepositoryContainer.java:316) org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:352) org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:189) org.springframework.extensions.webscripts.servlet.WebScriptServlet.service(WebScriptServlet.java:118) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.alfresco.web.app.servlet.GlobalLocalizationFilter.doFilter(GlobalLocalizationFilter.java:58) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:465) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) java.lang.Thread.run(Thread.java:619)   Exception:freemarker.template.TemplateModelException - get(properties) failed on instance of org.alfresco.repo.template.TemplateNode   freemarker.ext.beans.BeanModel.get(BeanModel.java:224)   Exception:org.alfresco.service.cmr.repository.TemplateException - 09240047 Error during processing of the template 'get(properties) failed on instance of org.alfresco.repo.template.TemplateNode'. Please contact your system administrator.   org.alfresco.repo.template.FreeMarkerProcessor.process(FreeMarkerProcessor.java:206)   Exception:org.springframework.extensions.webscripts.WebScriptException - 09240003 Wrapped Exception (with status template): 09240047 Error during processing of the template 'get(properties) failed on instance of org.alfresco.repo.template.TemplateNode'. Please contact your system administrator.   org.springframework.extensions.webscripts.AbstractWebScript.createStatusException(AbstractWebScript.java:884)   Server:Community v4.0.0 (a 3755) schema 5,018 Time:Oct 24, 2011 4:10:32 PM   Diagnostics:Inspect Web Script (org/alfresco/cmis/queries.post)

Help please.
regards,
Rekha