I've had this drive for about 18 months now and have never had a single problem until now. I was burning a couple of cds today, the first one burnt fine but the second one came up as burn process failed about halfway through. Now the drive will not recognize any type of cds whether they be burnt or commercial, but it still recognizes DVDs with no problem. I've upgraded the firmware to 2.1g and done a system restore to before the problem started but nothing has worked. Any suggestions?