please help guys.

i tried putting my buddies (neon green) n5 east map disc in my n4, everything works fine.

i tried putting my (red) n4 east map in and the monitor reads" not the appropriate disc. please insert appropriate disc."

now i cant use my navi..........

i tried resetting the unit. i tried resotring factory settings, no luck.

any ideas guys?!?!?!!?!?

When you inserted the N5 disc into your N4, it upgrade your firmware to a newer version. Your old N4 disc is no longer compatiable. Burn a copy of your buddy's N5 disc into a DVD+R Dl. TDK brand works great for me.

Bummer. I'm having the same problem but good to know there is a workaround. All I ned now are the newer discs. Bah!

here is how to down grade the your unit insert your buddys disc in to your unit then go to system tab find the menu that lets you change the language change the language to either french or spanish let let the dvd upgrade the unit after its done do it all over this time change the language back to english hit the eject button and insert your old 70's disc let it up grade / downgrade to english or do what I did give Pioneer 120 bucks and upgrade to the 90's disk