No /dev/cd or /dev/da for PX708UF

Hi

Recently I bought a Plextor PX-708UF device. It's an external dvd-burner connectably thru USB or FireWire.

On my dual-boot machine FreeBSD-current/Win98 it does
work without extra drivers or problems under Win98 with  firewire.

But under FreeBSD I neither get an cd-device or da-device. I only get a cam-device (pass1).
The cam-device works fine, I can read audio-tracks with cdda2wav and I can eject with camcontrol for example.

Neither does it work connected with USB. (I can connect
my memory stick with USB and gets a /dev/da0 device).

I am completly new on FireWire use. Do I need to do something special?

The only error I can detect is error 22 during Inquiry.

Can someone help me?

kernel: (probe0:sbp0:0:0:0): INQUIRY. CDB: 12 1 80 0 ff 0
kernel: sbp0:0:0 XPT_SCSI_IO: cmd: 12 01 80 00 ff 00 00 00 00 00, flags: 0x40, 6b cmd/255b data/18b sense
kernel: sbp0:0:0 SCSI status 2 sfmt 0 valid 0 key 5 code 24 qlfr 0 len 7
kernel: (probe0:sbp0:0:0:0): xpt_done
kernel: Current DB 0
kernel: ch = 0
kernel: Current OP   KEY INT BR   len     Addr   Depend Stat: Cnt
kernel: 07baed00 OUTM ST2 NEV NEV    16 00000000 00000000 0000:0000 Nostat
kernel: 0x00826110 0xffc0ffff 0xf0010108 0x00080000
kernel: 07baed00 OUTL ST0 ALL ALL     8 003dc1b0 07baed80 8452:e136 RUN,ACTIVE, ack pend(12)
kernel: (probe0:sbp0:0:0:0): camisr
kernel: (probe0:sbp0:0:0:0): probedone 
kernel: (probe0:sbp0:0:0:0): xpt_setup_ccb
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): error 22
kernel: (probe0:sbp0:0:0:0): Unretryable Error
kernel: (probe0:sbp0:0:0:0): xpt_setup_ccb
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): xpt_done
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): xpt_setup_ccb
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): xpt_done
kernel: (probe0:sbp0:0:0:0): xpt_setup_ccb
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): xpt_done
kernel: (probe0:sbp0:0:0:0): xpt_done
kernel: (probe0:sbp0:0:0:0): xpt_schedule
kernel: (probe0:sbp0:0:0:0):    added periph to queue
kernel: (probe0:sbp0:0:0:0):    calling xpt_run_devq
kernel: (probe0:sbp0:0:0:0): xpt_setup_ccb
kernel: (probe0:sbp0:0:0:0): probestart
kernel: (probe0:sbp0:0:0:0): xpt_action
kernel: (probe0:sbp0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0