Perl can't find your file, you have to tell perl where it is:
push @INC, 'path\\to\\usr_pin.conf.pl';
Please note: I noticed you are on windows, those double slashes are needed because otherwise you'll escape the letter following the slash.
Update:Oh, and listen to Nysus, he's right on the mark.
The 15 year old, freshman programmer,
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Want more info? How to link or
or How to display code and escape characters
are good places to start.