Pioneer DVL-700. Disc tray won't eject..

So I got this DVL-700 LD/DVD player. The DVD player tray will open, but the LD will not eject, without a good tap (I'll get to that in a minute). When I press the eject button, it starts moving around like it is preparing, then you hear this very loud grinding noise, like something is stuck... but I've taken it apart and I still couldn't quite see exactly what it was that was making the noise. But I pin-pointed the general location.

But... I took off this back plate, and when I kind of hit this part while it's trying to eject, it will suddenly fix it. But I'd rather not do that every time I need to use it.

I took a picture of the back where I have to hit to get it to perform the eject. Right around where that red marking is. This is also where the noise is coming from.

See image here: http://img.photobucket.com/albums/v700/Veepa/ldback.jpg

So anyone know what I can do about this?

Thanks in advance.