Error en el DVD Srink

hola como estan,

el problema q tube es q quise hacer un back up de una imagen de dvd q tenia y me puso este cartel ..

http://img30.exs.cx/img30/2203/dibujo5pk.jpg

dice asi :

DVD-Video files reallocation started

1A23-0809-9030-2480-9735-0486

Windows XP 5.1
IA32
WinAspi: File 'Wnaspi32.dll': Ver=4.71 (0002), size=45056 bytes, created 17/07/2002 09:20:56 a.m.
ahead WinASPI: File 'C:\Archivos de programa\Ahead\Nero\Wnaspi32.dll': Ver=2.0.1.74, size=164112 bytes, created 26/10/2004 05:35:34 p.m.
Nero API version: 6.6.0.3
Using interface version: 6.3.1.4
Installed in: C:\Archivos de programa\Ahead\Nero\
Application: ahead\Nero - Burning Rom
Recorder: <PIONEER DVD-RW DVR-108> Version: 1.14 - HA 0 TA 1 - 6.6.0.3
Adapter driver: <atapi> HA 0
Drive buffer : 2000kB
Bus Type : default (0) -> ATAPI, detected: ATAPI

=== Scsi-Device-Map ===
DiskPeripheral : WDC WD1200BB-00DWA0 atapi Port 0 ID 0 DMA: On
CdRomPeripheral : PIONEER DVD-RW DVR-108 atapi Port 0 ID 1 DMA: On
CdRomPeripheral : Generic DVD-ROM 1.0 d347prt Port 2 ID 0 DMA: Off

=== CDRom-Device-Map ===
PIONEER DVD-RW DVR-108 D: CDRom0
Generic DVD-ROM E: CDRom1
=======================

AutoRun : 1
Excluded drive IDs:
WriteBufferSize: 83886080 (0) Byte
ShowDrvBufStat : 0
BUFE : 0
Physical memory : 767MB (785952kB)
Free physical memory: 243MB (249668kB)
Memory in use : 68 %
Uncached PFiles: 0x0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

8.1.2005
NeroAPI
03:10:38 p.m. #1 Phase 112 File APIProgress.cpp, Line 276
DVD-Video files reallocation started

03:10:38 p.m. #2 DVDREALLOC -21 File DVDVideoCompilation.cpp, Line 1183
Required file 'VTS_01_0.VOB' is not present

03:10:38 p.m. #3 Phase 115 File APIProgress.cpp, Line 276
DVD-Video files reallocation failed

03:10:38 p.m. #4 Text 0 File NeroAPIBurnFS.cpp, Line 206
Failed to realloc DVD video files


Existing drivers:
File 'Drivers\ASPI32.SYS': Ver=4.71 (0002), size=16877 bytes, created 17/07/2002 08:53:02 a.m.

Registry Keys:
HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\AllocateCDROMs : 0 (Security Option)




espero q me puedan ayudar..

gracias..