Ghazi

I have this problem with the CD changer, it doesnt have the disk stuck in slot 1, i opened and check, but it doesnt take a CD in 1, but it sure does in slot 2, but doesnt play, i get the error message in all the slot, and now all of the sudden, my slot 2 CD is stuck and on the screen, it says all the CD slot at FULL (like 1 to 6 are saying cd in). This is my problem, can someone suggest anything about that.

one more thing, can someone suggest any good cd changer for this model? which would fit right in, with no problems, or in dash DVD, which one is better for this model?
plz plz