I'd like to see the line where the file gets opened.

Here's a thought. Put the following line somewhere near the top of your program (not the first line):

use autodie;
[download]

Return and report what happened.

It's possible the file isn't opening correctly, and if you're not checking for success it's failing silently.

bIlujDI' yIchegh()Qo'; yIHegh()! <---- extra credit. ;)