After replacing all module folders with originals from drupal downloaded folder, I now get a new error message to the one I had before (which nobody replied to).

vti_encoding:SR|utf8-nl vti_timelastmodified:TR|24 Jan 2007 23:29:58 -0000 vti_extenderversion:SR|5.0.2.2623 vti_cacheddtm:TX|24 Jan 2007 23:29:58 -0000 vti_filesize:IR|38710 vti_backlinkinfo:VX| vti_encoding:SR|utf8-nl vti_timelastmodified:TR|24 Jan 2007 23:39:57 -0000 vti_extenderversion:SR|5.0.2.2623 vti_cacheddtm:TX|24 Jan 2007 23:39:57 -0000 vti_filesize:IR|61893 vti_backlinkinfo:VX| vti_encoding:SR|utf8-nl vti_timelastmodified:TR|24 Jan 2007 22:34:24 -0000 vti_extenderversion:SR|5.0.2.2623 vti_cacheddtm:TX|24 Jan 2007 22:34:24 -0000 vti_filesize:IR|58568 vti_backlinkinfo:VX| vti_encoding:SR|utf8-nl vti_timelastmodified:TR|24 Jan 2007 23:40:30 -0000 vti_extenderversion:SR|5.0.2.2623 vti_cacheddtm:TX|24 Jan 2007 23:40:30 -0000 vti_filesize:IR|16558 vti_backlinkinfo:VX| vti_encoding:SR|utf8-nl vti_timelastmodified:TR|24 Jan 2007 23:42:32 -0000 vti_extenderversion:SR|5.0.2.2623 vti_cacheddtm:TX|24 Jan 2007 23:42:32 -0000 vti_filesize:IR|30172 vti_backlinkinfo:VX|
Fatal error: Call to undefined function: filter_xss_bad_protocol() in /home/www/matfor1.freehostia.com/drupal-5.0/includes/common.inc on line 837