cd player problem

[MAC]

On 3 or 4 occasions, my Hummer CD player ejected one CD automatically and refused to accept it again. This is solved when I turned off the radio/CD player and reinserted the same CD later when parked. Everytime it happened, I have been playing the same CD again and again, ignoring the other 5 CDs. Not a big issue to me yet. I think the player simply got sick of these 5-6 songs I kept on replaying, and the other 5 CDs got together to kick the teacher's pet out of the classroom. Other than that(which hasn't happen for many weeks,) all is fine with my Hummer CD player.

One of the CD players I have at home is a cheap unit which skips at few spots on few CDs or kept on repeating the same line in a couple songs. But the same CDs in Hummer player have no problem. I know some here think the player and sound are bad/poor, but personally I am very impressed with the Hummer sound system, I have yet to be able to pass the middle range mark on volumn, which is already very loud and I can feel the bass shaking the 4 tons Hummer.