Jo ich hab ein problem beim brennen von .iso cd mit cdrecord. (ios erstellt mit mkiosfs)

[root@pc *****]# cdrecord -v speed=20 dev=0,3,0 ****.iso
Cdrecord 1.11a32 (i586-mandrake-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,3,0'
scsibus: 0 target: 3 lun: 0
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.6'
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'ATAPI '
Identifikation : 'CD-R/RW 20X10 '
Revision : 'H.DH'
Device seems to be: Generic mmc CD-RW.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags : SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO RAW/R16 RAW/R96R
FIFO size : 4194304 = 4096 KB
Track 01: data 564 MB
Total size: 648 MB (64:16.88) = 289266 sectors
Lout start: 649 MB (64:18/66) = 289266 sectors
cdrecord: Input/output error. test unit ready: scsi sendcmd: no error
CDB: 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 02 00 00 00 00 0A 00 00 00 00 3A 00 00 00
Sense Key: 0x2 Not Ready, Segment 0
Sense Code: 0x3A Qual 0x00 (medium not present) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.000s timeout 40s
cdrecord: No disk / Wrong disk!


egal welches medium ich einlege! kein rohling will funktionieren.

Brenner: acer 20*10*40
Linux: Mandrake 9.0

bitte, bräuchte wirklich schnell hilfe...