1. The form that I built in CS3 with DFP1 works exactly as before with the DFP2 include file.
2. I tried adding the progress bar script to the above file in CS4 with DFP2. The result is that the progress indicator works and so does the form.
This tells me that the problem is in the page code and possibly the extension itself...
I will open a support ticket when I have the time.