that happened to me b4 check if its on the ledge right like try lifting it up and down the rom sits on a wheel on each side which makes it pop in and out it might not be on there right.
i tryed the pin whole and nonthin happen...and i tryed to take it out and put it back on track but it seems like it was alright...it started doing this cuz i accidentally hit my knee on it
Man what you need to do is go down to the nearest beach and get you some sand. Then, go back home pour the sand into your dvd player and turn the power on, then wrap the dvd player up tightly in a towel and press the eject button 5 times...