Threading / UIActivityIndicatorView with In App Purchase

Let me first say, my In App Purchase works.

I have been struggling with the Activity Indicator / Threading for more than a week now. I am having real problems getting my spinner (UIActivityIndicatorView) to play nice within my InAppPurchase.m

I am using the same threading code in many other places and it works fine.

Is there something about how the IAP process works that causes problems with basic threading?

Right now, the spinner spins between the time you tap the buyButton and the first alert appears (“Do you want to buy? ...”), but no spinner after that.

Tried posting the code but apparently made the post too long. You can see the .m file here: http://stackoverflow.com/questions/4170853/thre…