lots of coasters, no cups..

[DragonAce]

am having problems doing disk copy..
trying to copy the DKKaraoke series (Edit-A-Vision)
have an Iwill KA-266 w/ Athlon 1.4, 256 meg of DDR, 2x30G 7200 rpm HDD's running in Raid0..
burner is a Yamaha 2100E (16-10-40)

have tried everything from auto speed all the way down to 1x..
keep encountering the same error..

error:'write' command failed on device 0:0:0
unrecoverable hardware error (04h 00h 02h 04h 08h 03h)

i know the setup i have works well, i've burnt at 16x running two instances of folding@home & winamp with Roxio's EZCD 5 and haven't ever had a problem with either audio or data copying..

what am i doing wrong?????
anyone?????