Out of curiosity, does it work before you convert it to .exe? Also, are you converting it to a dependent or a freestanding exe file?

Very generically, it could be a problem with the perl program, perlsvc, the OS, or the executable. So if it works before the conversion, that helps narrow things down. It's windows, so... umm... try a reboot :)

If it doesn't work as perl, you might try checking to make sure Win32::MsgBox is up to date. Also, I found this node which might give you an alternative.

Pretending it does work in perl, is there a way for you to execute the program in a console? It might be trying to print out all sorts of useful error messages that you could be missing if you're double clicking an executable.

Best,
starX