If that's the code you're trying to run, I see a few problems. I'll take it for granted that you've just edited out the declarations and assignments for the database connection strings, and when I put dummy assignments back in, the script compiles ok. But…

• Line 26 might cause a runtime error (param('per_page');) at best, it does nothing (except add confusion) -- have you checked the web server error log after the script runs? You might try adding use CGI::Carp 'fatalsToBrowser';
• I'd be very suspicious/nervous about the assignment to $dsp at line 59, esp. because you're using hard-coded numbers in a substr call, right after changing all apostrophes to "%27" -- how confident are you that substr() is returning what you really want? I'll bet there's a better way to get what you want.
• The "href" value that you assign at line 77 looks wrong -- I think you left out &page before the second '='

Eventually you'll want to switch over to using a template module - store your page layout as an HTML(ish) plain-text template file, and let the module plug in all the context-dependent variables for you. But that's a slightly bigger step for later.

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