cd drive not reading disk

I tried to install a printer onto my Studio XPS that I just received and when the software was installing the printer said their was no disk in the slot.  So I took the disk out and reinserted it.  It continued to install from where it left off untill it did it again.  I restarted the computer hoping that that would solve the problem, but now it won't auto run the cd nor show that their is that cd in the slot.  It also does this with Microsoft office.  It will though play a music cd, but won't recognize the printer disk or microsoft office.  What should I do?