My 105 has been acting up for a few weeks now, writing to 4x media which it previously worked fine with at 2x. Then today I go to burn a cd-r and it keeps giving me a "can't start disc at once" error on Nero and gives a bad paramater message. Stomp does the same thing. Burning as a disc at once/90 will write the disc but not finalize it. I upgraded the firmware to the latest to see if that fixed it and now the dvd burning works perfectly at 4x, the cd-r problem still exists however. I have uninstalled and re-installed the drive, nero, stomp, aspi drivers etc. Nothing is working so far. Any ideas?