If I understand correctly, your trying to:

1. Create a new module.
2. Call that module from a script.
3. From that script, call a variable that is defined in the new module that you created.

If that's correct, I'm probably shouldn't be offering advice, but I'll try anyways. I've never written my own module, but I think what you're needing to do is export the variable/function. I believe that perlmodlib would probably have some useful information. You'll want to look for 'exporting' instead of 'globals'.