a lot of routes all of a sudden will not work and says there is no route calculation for it hwen they have worked in the past. Also when navi dvd is in, i can not do address search and a bunch of other options, any idea what the problems its, hte disc seems ot be fine n works when it wants to its an AVIC-N2.

well i do not know what the exact problem was or is, but i reset the system, n downgraded to orginal disk, everything is working fine