I seem to have installed successfully, but get blank screen. This is the error.txt message generated. Can someone tell me what the problem might be?

Thanks in advance for any advice...

[06-Dec-2003 00:35:05] PHP Warning: Failed opening '../wfchannel_v1.02/mainfile.php' for inclusion (include_path='.;c:\php\includes') in d:\web\server\dev-builds\new\pelican\xoops-2.0.5\html\modules\wfchannel\header.php on line 11
[06-Dec-2003 00:35:05] PHP Notice: Use of undefined constant XOOPS_ROOT_PATH - assumed 'XOOPS_ROOT_PATH' in d:\web\server\dev-builds\new\pelican\xoops-2.0.5\html\modules\wfchannel\header.php on line 12
[06-Dec-2003 00:35:05] PHP Warning: Failed opening 'XOOPS_ROOT_PATH/modules/wfchannel/include/functions.php' for inclusion (include_path='.;c:\php\includes') in d:\web\server\dev-builds\new\pelican\xoops-2.0.5\html\modules\wfchannel\header.php on line 12
[06-Dec-2003 00:35:05] PHP Fatal error: Undefined class name 'mytextsanitizer' in d:\web\server\dev-builds\new\pelican\xoops-2.0.5\html\modules\wfchannel\header.php on line 14

Why is this include_path='.;c:\php\includes' in there?

Hi CBlue... I'm not a coder, and haven't altered the downloaded module code, so can't give you an answer.