Maybe your eject button is sticking. Try using software eject. Either way, RMA.

I had a Creative Labs CD-ROM a few years ago. When I took it out of the box, the tray was about 1/4" opened. I immediately thought, uh-oh. I plugged in the power and cycled it a few times. It would never close. Luckily, I had bought it at Wal-Mart which has a very liberal return policy.
