God, I hate this thing. I have had pretty much the same problem as said above, but with the factory disc! At first, it would not load, but would let me use the radio/ipod. Then, the map eventually started coming up, but I had the problem described with some of the buttons not working (search by address etc.). Now, I tried to change the language, and when it reset, it rejected the factory nav disc, the only disc that has ever been used. Any ideas guys? I am at my wits end here trying to get this thing to work.