DVD shrink and nero.....computer expert needed!?

I used to copy DVDs quite happily using dvd shrink. I had movie files and tried to back them up, it goes through all the motions of analyzing etc but when it comes to copying it onto disc it spits the disc out and this message comes up..............can you tell me whats wrong and how to fix it ?

Windows XP 5.1

IA32

WinAspi: -

ahead WinASPI: File 'C:\Program Files\Ahead\Nero\Wnaspi32.dll': Ver=2.0.1.74, size=164112 bytes, created 02/11/2004 12:54:32

NT-SPTI used

Nero API version: 6.6.1.4

Using interface version: 6.3.1.4

Installed in: C:\Program Files\Ahead\Nero\

Application: ahead\Nero - Burning Rom

Internal Version: 6, 6, 1, 4d

Recorder: %26lt;_NEC DVD_RW ND-3520A%26gt; Version: 1.04 - HA 1 TA 1 - 6.6.1.4

Adapter driver: %26lt;IDE%26gt; HA 1

Drive buffer : 2048kB

Bus Type : default (0) -%26gt; ATAPI, detected: ?

=== Scsi-Device-Map ===

DiskPeripheral : Maxtor 6Y120L0 atapi Port 0 ID 0 DMA: On

CdRomPeripheral : HL-DT-ST DVD-ROM GDR8163B atapi Port 0 ID 1 DMA: On

CdRomPeripheral : _NEC DVD_RW ND-3520A atapi Port 3 ID 0 DMA: On

=== CDRom-Device-Map ===

HL-DT-ST DVD-ROM GDR8163B D: CDRom0

_NEC DVD_RW ND-3520A E: CDRom1

=======================

AutoRun : 1

Excluded drive IDs:

WriteBufferSize: 66060288 (0) Byte

ShowDrvBufStat : 0

BUFE : 0

Physical memory : 447MB (457968kB)