I might misunderstand the question, but it appears to me that you are double-clicking a perl script with the expectation that Windows will run the script for you.

If this is the case, there is apparently a file association already setup for the extension you are using, e.g., "*.pl" that tells Windows to open the file in Notepad and not run the file (perl xxxx.pl).

You could change the file association (which I don't have time to address here since I'm at work) or, you could open a DOS window (assuming the perl binary is in your path), change to the directory where you program is located, and issue the command: perl xxxx.pl.

Good luck.