Tim,
I tried it on different Windows OS VMs (including Windows 7) and there is a serious problem with your app. See attached screenshot. I can't even enter my name or birthday. I am afraid you have to go back to the drawing board. This has absolutely nothing to do with your installation. The issue is definitely at application level (note the two message boxes; the app is completely locked now). See my previous link (how to make an app UAC-aware). Sorry for the bad news.
Friedrich