Is the code for the create dynamic array the same on both of these pages? If so then it would indicate that there is something else interfering with it.
One thing that you can try would be to copy the code from the blank page with just the select lists on it into your other page. So long as the code is there correctly it should work for you regardless of weather you can see the server behavior in the panel.
Please give this a try to see if it works for you, if you have any trouble with this please post back with both pages in question and I can take a look for you.