Solved! CD Drive

[GravityMPS2]

I recently upgraded my HDD and while the computer was scanning it I tried to put back in the CD drive. It got stuck right before it clicked into place, and when I tried to pull it out it was stuck. I re-opened the computer to find nothing was blocking it. So I tried again and same problem.
Any ideas whats the cause and how to fix it?
Thanks

 

[helpstar]

might be dislodged, try opening it up and have a look inside or get a cheap DVD burner