Mystery infinite loop

hey all,
not too sure if this is in fact an infinite loop but there is something that is causing “Flash Player to run slowly…”.

Here is the breakdown. I have a bunch of form objects that are placed onto the stage VIA an AS2 class based on the content of an XML file. The problem is consistently happening when I am working with my combo boxes. They generate fine and I can open ONE, as soon I try to select a second combo box, the interface locks up like it is stuck in a loop.

I have not attached any functional code to the combo boxes yet, just added the items to them. What could this be?