[Perl-beginners] what the? Code not working on Windoze

Any preliminary thoughts? I have code that works perfectly on my linux
machine. I'm trying to migrate it to the Windows server these people have
and now it runs badly.
Helps to show some code :-)
My CGI::FormBuilder forms don't render well and I
keep finding 'Useless use of a constant in Void context" errors in the log
file, but these ran fine on UNIX. Is there a general rule of thumb for
figuring this stuff out? (Yes I have installed the correct modules on the
windows box, via ppm.)
Thanks,
John