Here's your most immediate problem:

my $fifthquestion = param("FirsthQuestion");
[download]

I would recommend less cutting/pasting, and more Perlish idioms, as they tend to reduce the probability of this type of error. The problem is that to learn the "Perl Way" (which isn't just a single way), is to learn Perl. But as you learn Perl, your scripting will mature, and you'll be able to accomplish more.

A great place to start is Learning Perl, an O'Reilly & Associates book. :) And of course hanging out here awhile helps too. It's not as hard as it might seem at first, and on the other hand, it's a quest never completed. *smile*

Good luck!