a problem when calling Perl sub from Visual C++ 6.0

when i am trying to call a perl sub which 'use HTML:TokenParser' from VC by writting 'call_pv(...)', it failed, but without the 'use... 'and relvant Perl code, it succeed, why? ( i am using Active Perl 5.6) is there any method

RE: Perl-Editor

i am using the UltraEditor-32 embeded with Active Perl 5.6. UltraEdit-32 is a good text editor on Win32, it has syntax sensitive to C, Perl and other language. while Active Perl 5.6 provides a good development tools including a visual debugger. (run "perl.exe -d"