I contacted Pioneer regarding upgrading Map infomation to the D2 and also happened to discuss your situation, basically your software crashed and the only way to fix it is to reflash the system. Supposedly lot of people are running into this problem and all are victims of copied DVD's. This is not to say all are bad, because that's not true, I guess its a hit or miss.
He did say Pioneer charges $75 to do the reflash and 3 weeks times is required for the entire process of shipping back and forth. Im sure someone on this forum is knowledgeable on figuring out how to reflash the system the