First I tried to upgrade to the 80MT disc but right after the update it shows the "insert appropriate disc".
Then I used the method in this tread to downgrade with my original disc. I downgraded fine but when I rebooted it still saids "insert appropriate disc".
I was looking at the version in the service menu and it shows that next to the GPS software, instead of version it shows "NG" I am assuming it means no good?
Any ideas?