radio/cd question

[frenzy1]

Hi !

I have several cd compilations that I copied myself (using NERO burner). I never had any problems playing these copied cd's in the disk changer. But, since a couple of weeks, they won't play anymore : the disk changer throws it back out and it reads : check/clean disk.
I checked, and the cd 's aren't scratched, dirty,... whatever. The same ones play perfectly in my wife's car, home stereo, anywhere.

Anyone has an explanation ???

thanks

Frenzy