Twice I have tried to order Parallels Desktop for Mac and pay via Paypal. Each time, there is not a followup that allows me to pay. It accepts my order, but doesn't allow me to pay. I've checked my Paypal account and there's no invoice there to be paid either. In both cases I have received a followup email that says my order has been canceled because you haven't received payment. No kidding, if you would just allow me to pay there would be no problem. What's going on here? I just placed my 3rd order today again with no way to pay via Paypal, so it looks like it's going to happen again.