I just bought a copied BMW 2008.1 high map dvd from someone in this forum...and it won't read, on the screen it says please insert a cd/dvd...I have tried many many times...just won't read, but if I put my OEM 2003 dvd map in, it read perfectly...why is this?

BTW: I have the MK4 V31 version.

is this the copied dvd problem or my lens problem?

thanks!
Mike