I tried cdrecord-ProDVD and dvdrecord, both cannot burn the DVD. The error message likes this:
# dvdrecord dev=2,0,0 KNOPPIX_V4.0.2DVD-2005-09-23-EN.iso
dvdrtools v0.2.1
Portions (C) 2002-2005 Ark Linux <[email protected]>
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
Based on:
Cdrecord 1.11a15 (i386-pc-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling
scsidev: '2,0,0'
scsibus: 2 target: 0 lun: 0
Linux sg driver version: 3.5.31
Using libscg version 'bero-0.5a'
dvdrecord: Warning: using inofficial version of libscg (bero-0.5a '@(#)scsitransp.c 1.81 01/04/20 Copyright 1988,1995,2000 J. Schilling').
Device type : Removable CD-ROM
Version : 2
Response Format: 2
Capabilities :
Vendor_info : 'MATSHITA'
Identifikation : 'DVD-RAM SW-9571 '
Revision : 'A111'
Device seems to be: Generic mmc2 DVD.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags : SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO
dvdrecord: CD/DVD-Recorder not ready.

Is there a possible to let the DVD burner work? Thanks a lot!