Similar thing happened to me too, except that my CD Drive recognised some disks, but not others. It recognised all CDs that had data on them, but it only picked up about half the blank CDs. Additionally, it would not write any disks any more. Basically, I was told that my disk drive simply wore out and I need to get it replaced, which is quite cheap.

Check your drivers, and check if the disk drive picks up CDs with data on them . And really, for these more complex problems, I would go on computer help forums, not here... There is not too many people on these forums - I would only ask simple questions here, or ask here and then ask on a better forum if you do not get an answer.