My Nav System reading US maps only!!!

I just install OEM NAV system on my tahoe07 everything was going well untill I insert the US MAP disc ver 4, then I got message on the screen to accept SW update after I press OK it takes 5 min. updateing then my system working perfectly with US map only, but if I insert any other region map which is origianl gm map dvd, I got the following messege, this is not map DVD.

please help me to solve this issue.


:confused2::confused2::confused2: