pioneer avic n2 navigation not working

I sent my avic n2 back for a recall on the screen motor, when I got it back I hooked it back up and when I reset it, it does not go to the time screen, instead right to the main screen, I thought kinda weird, so I could not set the time.  I then put in the nav disk and  then a black screen came up which states "the disk is being checked".  After about  a minute it goes to the main screen, and when I hit the Nav button a white screen appears stating "attention this is not the appropriate disk, please insert the appropriate disk".  Everything else works fine, even the DVD player but for some reason I can't get the navigation screen to appear.  Is there something wrong with my disk, I tried both, or do I not have something properly hooked up, or is it my reset button?  Thanks in advance for any help.