No Output When Running Perl Scripts

I have used Active State Perl for a few years on other machines (XP, Vista), but am unable to get Perl to install correctly on my new Windows 7 64 bit machine. When I run a Perl script that outputs to the screen, I see no output. The output screen is blank (no errors appear).

Embarrassingly even a simple "Hello" program won't run.

I'd appreciate any help.

thanks,
Wyatt