This looks like you didn't use the correct incantation to start a Perl script.

You didn't mention what operating system and which Perl version you use, which makes it difficult to help.

Some subtle hints make me assume it's some Windows version and XAMPP. If that's the case, you need to look into your XAMPP configuration and documentation. And ISTR Apache can be configured to obey the shebang line under Windows, in which case it should contain something like

#!c:/xampp/perl/bin/perl.exe
[download]

(modify according to wherever your perl.exe is located)