Simplify. You seem to have debugged it down to one section of code involving a database fetch. Take that, run it on its own, and debug it until it works. The use of selectall_arrayref with the Columns => {} attribute looks suspicious to me. I would fiddle with that.

You didn't ask for general comments, but there are at least a couple of things in this script that will jump out at any experienced coder. The first is the lack of "use strict" at the top. That is a must. The second is that you are not using bind parameters with your SQL statements. You really should, since it is simpler and safer than all of the quoting you have right now. Kudos for using a template though. That's a step in the right direction.

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