error when edit and add the ckk

check and install everything...just fine... but when im trying to add the ckk with the video embeded i got this error...would tell me what wrong ?? thanks

warning: Parameter 1 to emthumb_emfield_widget_extra() expected to be a reference, value given in /home/xxx/xxx/includes/module.inc on line 462.
Backtrace: call_user_func_array(...)[module.inc:462] <=module_invoke(...)[emfield.cck.inc:232] <=_emfield_emfield_widget(...)[emfield.module:285] <=emfield_emfield_widget(...)[emvideo.module:539] <=emvideo_widget(...)[content.node_form.inc:185] <=content_multiple_value_form(...)[content.node_form.inc:93] <=content_field_form(...)[content.node_form.inc:15] <=content_form(...)[content.module:444] <=content_form_alter(...)[?:?] <=call_user_func_array(...)[common.inc:2829] <=drupal_alter(...)[form.inc:545] <=drupal_prepare_form(...)[form.inc:105] <=drupal_get_form(...)[node.pages.inc:15] <=node_page_edit(...)[?:?] <=call_user_func_array(...)[menu.inc:348] <=menu_execute_active_handler(a:0:{})[index.php:18] <=index.php