DVD ROM is not working

[qanda]This thread is about the LG 16X Super Multi DVD Rewriter. Click here to see full specs[/qanda]Please Help me. Am using a LG GSA-H10A DVD writer. It was damaged by a hurtle of the cd plate and the plate was locked. Then i removed it and detach the plate completely and fix it again. Now, the DVD Rom is recognized by the OS, but CDs (or DVDs) not reading. The problem is the motor which rotates the cd, is not working. It tries to rotate, but no rotation.

Please help me, what shall i do?
Please help me.

(I think that i tried to best of to keep the lens without damages, but am not sure it had been damaged)

Please please help me.
Waiting for a soon reply.
My mail address is chamindaindika@yahoo.com