My DVD RW thinks it is a CDW?

I’ve burned DVD using differents programs before but now I’ve got an ‘invalid field in CDR’ or simply unknow error on witchever program i am trying to use.
I checked the driver and I got:
Matrox 6Y160PO
Plextor DVDR PX-708A
Nero Image Drive 2 Scsi CDrom device
VOBID instant drive CD SCsi CDrom device
All for the DVDRW Plextor 708-A.
I have no idea where the SCSI devices come from, they weren’t there before…
I’ve tried to desinstall all the drives and driver but hte Plextor but it still refuse to burn.
Could anybody help? Thanks in advance,