I don't have enough information to comment on the major problem, but I can help with taint mode.

In your file extension associations, under 'Open', add the -T switch to perl. If you don't want to always run perl programs in taint mode, you can use another extension, like .plx or .cgi.

Update: See also replies to today's Taint with Perl on NT/IIS for a more detailed, but IIS-specific, discussion.

After Compline,
Zaxo