The problem is more that you're not telling us how to help you. Which perl version do you have, which system is it running on? (Business Server sounds like Windows NT?). I suspect if you really want to DIY, you're going to have to get the source for perl itself, or the POSIX module (see POSIX), and then compile it. You'll need a working C++ compiler for that.

You're still better off installing a complete perl, if that's at all possible. ActiveState has nice pre-packaged ones for Windows.

C.