I am trying to write an E39 processor and am getting a "polling error" when I try to license the vehicle. I had 8 GM credits and have only licensed a 2008 Vette (2 credits) so I have 6 available. I have tried 2 different USB cables with no change. If I hook up my MPVI2 it will show the licensing options. I have the MPVI registration code logged into my account on HPTuners.com and the software recognizes the interface as valid.
Suggestions?