My CD drive doesn't work when I insert disk in Cd drive it becomes busy.. why?

Does it do this with all discs or just one in particular?

If just this one, make sure disc is clean (no smudges or scratches)
Just clean as best you can

Thank y0u so much for this answer...

If still problem, try to use in another computer and then copy to something else so you can get it back to your computer