dvd shrink/nero burning bother

I had no problems then everything stopped burning, homegrown, back-ups...anyone make sense of the log?

Windows XP 5.1
IA32
WinAspi: File 'Wnaspi32.dll': Ver=4.60 (1021), size=45056 bytes, created 09/01/2005 8:44:12 pm
ahead WinASPI: File 'C:\Program Files\Ahead\Nero\Wnaspi32.dll': Ver=2.0.1.68, size=160016 bytes, created 22/07/2004 5:33:44 pm
Nero API version: 6.3.1.25
Using interface version: 6.3.1.4
Installed in: C:\Program Files\Ahead\Nero\
Application: ahead\Nero - Burning Rom
Recorder: <HL-DT-ST DVDRAM GSA-4081B>Version: A100 - HA 0 TA 1 - 6.3.1.25
Adapter driver: <atapi> HA 0
Drive buffer : 2048kB
Bus Type : default (0) -> ATAPI, detected: ATAPI

=== Scsi-Device-Map ===
DiskPeripheral : ST3200822A atapi Port 0 ID 0 DMA: On
CdRomPeripheral : HL-DT-ST DVDRAM GSA-4081B atapi Port 0 ID 1 DMA: On
CdRomPeripheral : BTC BCE1610IM atapi Port 1 ID 0 DMA: On
DiskPeripheral :               atapi Port 1 ID 1 DMA: Off

=== CDRom-Device-Map ===
HL-DT-ST DVDRAM GSA-4081 E: CDRom0
BTC BCE1610IM F: CDRom1
=======================

AutoRun : 1
Excluded drive IDs:
WriteBufferSize: 83886080 (0) Byte
ShowDrvBufStat : 0
BUFE : 0
Physical memory : 1023MB (1048048kB)
Free physical memory: 466MB (478160kB)
Memory in use : 54 %
Uncached PFiles: 0x0
Use Static Write Speed Table: 0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

13.2.2006
NeroAPI
10:18:55 pm #1 Phase 112 File APIProgress.cpp, Line 273
DVD-Video files reallocation started

10:18:55 pm #2 Phase 114 File APIProgress.cpp, Line 273
DVD-Video files reallocation completed (no file modified)

10:18:55 pm #3 Phase 111 File APIProgress.cpp, Line 273
DVD-Video files sorted

10:18:55 pm #4 Text 0 File Reader.cpp, Line 126
Reader running

10:18:55 pm #5 Text 0 File Writer.cpp, Line 124
Writer HL-DT-ST DVDRAM GSA-4081B running

10:18:55 pm #6 Text 0 File AudioCompilationImpl.cpp, Line 817
DRM: StartDrmRecording(RealRec:1, ImageRec:0, Copies:1)
DRM: Beginning burn process.

10:18:55 pm #7 ISO9660GEN -11 File geniso.cpp, Line 3899
First writeable address = 0 (0x00000000)

10:18:55 pm #8 ISO9660GEN -11 File geniso.cpp, Line 3899
First writeable address = 0 (0x00000000)

10:18:56 pm #9 Text 0 File Burncd.cpp, Line 3152
Turn on Disc-At-Once, using DVD media

10:21:59 pm #10 Text 0 File DlgWaitCD.cpp, Line 247
Last possible write address on media: 2298495 (510:46.45, 4489MB)
Last address to be written: 1971663 (438:08.63, 3850MB)

10:21:59 pm #11 Text 0 File DlgWaitCD.cpp, Line 259
Write in overburning mode: NO

10:21:59 pm #12 Text 0 File DlgWaitCD.cpp, Line 2162
Recorder: HL-DT-ST DVDRAM GSA-4081B, Media type: DVD-R
Disc Manufacturer: SKC Co - .,Ltd.
Disc Application Code: 64, Disc Physical Code: 193

10:21:59 pm #13 Text 0 File DlgWaitCD.cpp, Line 420
>>> Protocol of DlgWaitCD activities: <<<
=========================================
Insert empty disc to write to.
(Medium in drive: unknown. Medium required by compilation: DVD+R/RW, DVD-R/RW, DVD-RAM.)

10:21:59 pm #14 Text 0 File ThreadedTransferInterface.cpp, Line 813
Setup items (after recorder preparation)
0: TRM_DATA_MODE1 (CTransferItem)
2 indices, index0 (150) not provided
original disc pos #0 + 1971664 (1971664) = #1971664/438:8.64
relocatable, disc pos for caching/writing not required/required, no patch infos
-> TRM_DATA_MODE1, 2048, config 0, wanted index0 0 blocks, length 1971664 blocks [HL-DT-ST DVDRAM GSA-4081B]
--------------------------------------------------------------

10:21:59 pm #15 Text 0 File ThreadedTransferInterface.cpp, Line 984
Prepare recorder [HL-DT-ST DVDRAM GSA-4081B] for write in CUE-sheet-DAO
DAO infos:
==========
MCN: ""
TOCType: 0x00; Session Closed, disc fixated
Tracks 1 to 1:
1: TRM_DATA_MODE1, 2048/0x00, FilePos 0 0 4037967872, ISRC ""
DAO layout:
===========
__Start_|____Track_|_Idx_|_RecDep_|_CtrlAdr_
0 | lead-in | 0 | 0x00 | 0x41
0 | 1 | 0 | 0x00 | 0x41
0 | 1 | 1 | 0x00 | 0x41
1971664 | lead-out | 1 | 0x00 | 0x41

10:21:59 pm #16 Phase 24 File APIProgress.cpp, Line 273
Caching of files started

10:21:59 pm #17 Text 0 File Burncd.cpp, Line 4163
Cache writing successful.

10:21:59 pm #18 Phase 25 File APIProgress.cpp, Line 273
Caching of files completed

10:21:59 pm #19 Phase 36 File APIProgress.cpp, Line 273
Burn process started at 4x (5,540 KB/s)

10:21:59 pm #20 Text 0 File ThreadedTransferInterface.cpp, Line 2344
Verifying disc position of item 0 (relocatable, disc pos, no patch infos, orig at #0): write at #0

10:21:59 pm #21 Text 0 File DVDR.cpp, Line 2000
Recording mode: Sequential Recording Mode

10:21:59 pm #22 Text 0 File Mmc.cpp, Line 20660
Set BUFE: supported -> ON

10:21:59 pm #23 Text 0 File DVDR.cpp, Line 2141
Start write address at LBA 0
DVD high compatibility mode: Yes

10:21:59 pm #24 Text 0 File Cdrdrv.cpp, Line 8230
---- DVD Structure: Physical Format Information (00h) ----
Layer: 0, Address: 0 (0 h), AGID: 0; Length: 2050
Book Type: DVD-R (2), Part Version: 5
Disc Size: 120 mm, Maximum Rate: <not specified> (F h)
Number of Layers: 1, Track Path: Parallel Track Path (PTP), Layer Type: recordable
Linear Density: 0,267 um/bit, Track Density: 0,74 um/track
Starting Physical Sector Number of Data Area: 30000 h (DVD-ROM, DVD-R/-RW, DVD+R/+RW)
End Physical Sector Number of Data Area: 26127F h
End Sector Number in Layer 0: 0 h
Data in Burst Cutting Area (BCA) does not exist
Start sector number of the current Border-Out: 2FE10 h
Start sector number of the next Border-In: 2FFA0 h
Media Specific [16..63]:
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 02 FE 10 00 02 FF A0 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................

10:23:58 pm #25 SCSI -1135 File Cdrdrv.cpp, Line 1445
SCSI Exec, HA 0, TA 1, LUN 0, buffer 0x122C0000
Status: 0x04 (0x01, SCSI_ERR)
HA-Status 0x00 (0x00, OK)
TA-Status 0x02 (0x01, SCSI_TASTATUS_CHKCOND)
Sense Key: 0x03 (KEY_MEDIUM_ERROR)
Sense Code: 0x0C
Sense Qual: 0x00
CDB Data: 0x2A 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x20 0x00 0x00 0x00
Sense Data: 0x70 0x00 0x03 0x00 0x00 0x00 0x00 0x10
0x32 0x4D 0x03 0x0C 0x0C 0x00

10:23:58 pm #26 CDR -1135 File Writer.cpp, Line 304
Write error

10:23:58 pm #27 Text 0 File ThreadedTransfer.cpp, Line 229
all writers idle, stopping conversion

10:23:59 pm #28 Text 0 File ThreadedTransfer.cpp, Line 223
conversion idle, stopping reader

10:23:59 pm #29 Text 0 File DVDR.cpp, Line 2383
EndDAO: Last written address was -1

10:23:59 pm #30 CDR -1135 File WriterStatus.cpp, Line 164
Write error

10:23:59 pm #31 TRANSFER -24 File WriterStatus.cpp, Line 164
Could not perform end of Disc-at-once

10:23:59 pm #32 Phase 38 File APIProgress.cpp, Line 273
Burn process failed at 4x (5,540 KB/s)

10:23:59 pm #33 Text 0 File AudioCompilationImpl.cpp, Line 828
DRM: DRM burn session terminated.

10:23:59 pm #34 Text 0 File AudioCompilationImpl.cpp, Line 857
DRM: Closing entire DRM handling. Bye.


Existing drivers:
File 'Drivers\ASPI32.SYS': Ver=4.60 (1021), size=25244 bytes, created 09/01/2005 8:44:12 pm
File 'Drivers\InCDfs.SYS': Ver=4, 3, 0, 5, size=93440 bytes, created 13/09/2004 11:54:06 am (InCD4 driver for win NT/2K/XP)
File 'Drivers\InCDpass.SYS': Ver=4, 3, 0, 5, size=28672 bytes, created 13/09/2004 11:54:46 am (InCD4 driver for win NT/2K/XP)
File 'Drivers\InCDrec.SYS': Ver=4, 3, 0, 5, size=7680 bytes, created 13/09/2004 11:58:10 am (InCD4 driver for win NT/2K/XP)

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

Thanks in advance!