Fellow Dodge Tuners!

I had my Challenger worked on at a shop recently, tuning being one of the things done. I told them I wanted to own the credits and the MPVI2 hardware.

I recently hired a new tuner, and they are giving me TCM files for which I don't have credits. No worries I can buy credits.

When I try to buy more, it asks for the serial number of the MPVI2 device and then says I am not the owner.

How do I correct this?