If you're doing this in notepad on Windows, you should know that all files (even if you give extensions, in this case a .pl) will save as bonjour.pl.txt. To confirm, open up your command prompt cmd and type dir. You should find the cause of your problem.

As an aside, I suggest that you first get set up with a better development environment - get yourself a better text editor, say Notepad++ or Sublime Text. You'll thank yourself later in saving much of your productivity for better tasks :-)

Have fun!

EDIT:

Borked links :-( Thanks Corion!