"communication failure"in Nero

[burnX]

Got problems burning cd's in Nero after I upgraded to an Athlon 1700+ with MSI K7T266 pro mainboard.
Two out of three times I get an "communication failure" and the logfile says:

12:11:00 #12 SCSI -1024 File Cdrdrv.cpp, Line 1407
SCSI Exec, HA 1, TA 0, LUN 0, buffer 0x0296D188
Status: 0x04 (0x01, SCSI_ERR)
HA-Status 0x00 (0x00, OK)
TA-Status 0x02 (0x01, SCSI_TASTATUS_CHKCOND)
Sense Key: 0x04 (KEY_HARDWARE_ERROR)
Sense Code: 0x08
Sense Qual: 0x03
CDB Data: 0x2A 0x00 0x00 0x00 0xCE 0x77 0x00 0x00 0x1F 0x00 0x00 0x00
Sense Data: 0x70 0x00 0x04 0x00 0x00 0x00 0x00 0x12
0x00 0x00 0x00 0x00 0x08 0x03

My OS is WinXP Home-edition.
Burner: HP9100i, firmware 1,0a. I downloaded the newest Aspidrivers and the drivers for my VIAchip. My burner is secundary master and reader secundary slave...my two harddiscs are on primary.
Tried the two latest nero-versions and I don't have aSCSI-card!!!
What can I try else..??
(Everything worked before I upgraded..!!)