my plextor ultraplex 40x scsi cd rom drive has some problems...

http://www.plextor.com/english/support/plexhelper/scsi/blinkchart.html

amber led blinks five times..

"Offset adjustment failed:
Could not properly set the tracking offset for a CD-R/RW disc"

does anyone know how to fix this problem? im out of warranty and it was a really good drive before.

thanks