Hung in 64 bit standalone. (No debugger)

I have an app that works perfectly as a standalone 32 bit web app.
However it hangs when compiled as a 64 bit application.

I’m at the point where I have to insert debug lines into the code that print out where the code is… but I’ve not figured it out yet.

How am I suppose to debug this thing?

My first suspicion is that something maybe be happening due to a raise event that signals the end of the upload of data.
I create lots of views and I’m wondering if there are limitations on what can and can’t be done in that event handler.