Marketpress is not doing anything once the submit button is pressed.

Marketpress is not doing anything once an order is ready for submission and the submit button is pressed. It was confirmed as working on 9/1 but stopped some time after that. Since then I upgraded my hosting from shared to VPS and everything was cloned to the VPS server. Is there anything that needed to be changed in marketpress when this happened? I did a plugin conflict test and checked the debug log. It did not help.