Rejected? Rejected? You were lucky. In my day we used to dream of having CD's rejected! OOps wrong forum. And now for something completely different. This sometimes happens when the CD player has difficulty reading the CD. Dirt, scratches, spam, finger prints, Toe jam, spam, navel fluff, meatball sauce, spam or any other foreign body can cause the player problems. Try cleaning the disk with CD cleaner or even dish soap. Don't worry about getting it wet. Make sure you get all the soap off it, dry using a soft cloth working from the middle to the edge. Then try it again.
I'm guessing that the CD player reads other CD's without a problem.

Hope this helps

P