Cannot read CDs

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I have a Benq CD burner since 2003 and it has worked fine until a few months ago, but now the only thing I can do on it is burn CDs. It doesn't read them anymore. I mean it will read a store bought CD, but no burnt ones anymore. For example, I burned some photos to one of my disks and when I put it in the drive it recognised it, but when I did so again later it just flashed the disk cursor a couple of times and nothing happened. My OS is WinXP SP2 and I use Nero 6 for burning CDs. I've checked the driver with Device Manager and nothing appears to be wrong with it. All I can really get from it is that it's an ATAPI CD-R/RW 48x16. I've checked the BIOS too and the CD drive is the first of three to boot up. I've also reinstalled the driver, used a lens cleaner and different CD-R brands, but that didn't change anything. I don't use the drive a lot and the maximum speed that I burn my CDs to is 12x. I'm not sure if the actual drive is faulty, or if I'm just missing something. Can anyone help me out with this cause I really don't want to buy a new one right now? Thank you.