Pay Per View- clients drop out of the process after creating a login

So I installed pay per view to protect all the content here: http://polymerclayadventure.com/classroom

It's working fine, however, once a potential client comes to the site, decides to purchase, and goes into the "create a login id" process, I've lost the sale.

This is because they are NOT returned to the purchase process after creating their login, so they abort.

Am I missing something? Can I get some kind of redirect so they are thanked for logging in and taken back to the purchase area?