May be button of ur cdrom is pressed continously or if u use multimedia keyboard the eject buttin may be pressed continously,
Try checking ur Cdrom in some other sysstem, if same prblm occurs then time to get the new one.
What a silly Solution! How can you connect the cable whenever you need to run some CD-ROM and then remove i when you dont need it? Aint that some risky business?
As for Pepsi's problem, the CD-ROM happens to have a pressed button. Did you bang your drive or jerk it before the problem erupted? If so, get your drive serviced. If this doesnt help, get a new drive; preferably a Combo or DVD Writer.