Pay Per View repeats request for payment

I have Pay Per View set up to sell some books. It's worked flawlessly until recently when I heard from a customer that it wasn't allowing him to confirm his payment. It simply asks for payment again.
http://escapeamericanow.info/resources/life-in-chile/

In case it's related, I'm also noticing that Chat and Ultimate Facebook won't update now. I get this - "Download failed. Failed to write request to temporary file."

Support access is activated in case it helps.

Thanks!
Joe