External DVD drive problem

I have Apple external DVD drive (about 5 years old) hooked up to my new MacMini. Have watched movies on it before so I know it works. I found an old disc today while cleaning the office and wasn't sure what was on it so I popped it in the drive. Drive made a few noises and then stopped. Disc never showed up on the monitor. I tried using Command E to get it to eject and it won't spit out the disc. I doubled checked the drive itself and don't see any tiny buttons to push to get it to eject. I tried unplugging it from the Mini and putting it back in again. Nothing happened.

How do I get this disc out of my drive???