help needed - cant burn any dvds anymore

Hi

My PC wont burn DVDs anymore. I get a medium error shortly after the simulation has started.

I've copied some of the error log below which hopefully will give somebody some ideas as to the problem.

Thanks
------------------------------

Windows XP 5.1
IA32
WinAspi: File 'Wnaspi32.dll': Ver=4.71 (0002), size=45056 bytes, created 19/07/2004 17:41:48
ahead WinASPI: File 'D:\Program Files\Nero\Nero 7\Core\Wnaspi32.dll': Ver=2.0.1.74, size=164112 bytes, created 02/11/2004 13:54:32

NT-SPTI used
Nero Version: 7.0.1.4
Internal Version: 7, 0, 1, 4

Recorder: <LITE-ON DVDRW LDW-811S> Version: HS0Q - HA 1 TA 0 - 7.0.1.4
Adapter driver: <IDE> HA 1
Drive buffer : 2048kB
Bus Type : default (0) -> ATAPI, detected: ?
CD-ROM: <LITEON DVD-ROM LTD163D >Version: GHR3 - HA 1 TA 1 - 7.0.1.4
Adapter driver: <IDE> HA 1

=== Scsi-Device-Map ===
DiskPeripheral : ST340824A atapi Port 0 ID 0 DMA: Off
DiskPeripheral : ST3120026A atapi Port 0 ID 1 DMA: Off
CdRomPeripheral : LITE-ON DVDRW LDW-811S atapi Port 1 ID 0 DMA: On
CdRomPeripheral : LITEON DVD-ROM LTD163D atapi Port 1 ID 1 DMA: Off

=== CDRom-Device-Map ===
LITE-ON DVDRW LDW-811S I: CDRom0
LITEON DVD-ROM LTD163D J: CDRom1
=======================

AutoRun : 0
Excluded drive IDs:
WriteBufferSize: 74448896 (0) Byte
ShowDrvBufStat : 1
BUFE : 0
Physical memory : 511MB (523760kB)
Free physical memory: 198MB (203472kB)
Memory in use : 61 %
Uncached PFiles: 0x0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

2.6.2006
UDF/ISO compilation
21:59:51 #1 Phase 112 File dlgbrnst.cpp, Line 1725
DVD-Video files reallocation started

21:59:51 #2 Phase 114 File dlgbrnst.cpp, Line 1725
DVD-Video files reallocation completed (no file modified)

21:59:51 #3 Text 0 File Isodoc.cpp, Line 6411
UDF document burn settings
------------------------------------------
Determine maximum speed : FALSE
Simulate : TRUE
Write : TRUE
Finalize CD : TRUE
Multisession : FALSE
Burning mode : DAO
Mode : 1
UDF Mode : UDF/ISO bridge
UDF Revision : 1.02
UDF Partition Type : physical
ISO Level : 1 (Max. of 11 = 8 + 3 char)
Character set : ISO 9660
Joliet :FALSE
Allow pathdepth more than 8 directories : TRUE
Allow more than 255 characters in path : TRUE
Write ISO9660 ;1 file extensions : TRUE

21:59:51 #4 Phase 111 File dlgbrnst.cpp, Line 1725
DVD-Video files sorted

21:59:51 #5 Text 0 File ThreadedTransfer.cpp, Line 525
ReadBuffer-Pipe got 72704KB of Memory

21:59:51 #6 Text 0 File Reader.cpp, Line 124
Reader running

21:59:51 #7 Text 0 File Writer.cpp, Line 113
Writer I: LITE-ON DVDRW LDW-811S running
==================================================================================
21:59:52 #26 Text 0 File Cdrdrv.cpp, Line 8411
---- DVD Structure: Physical Format Information (00h) ----
Layer: 0, Address: 0 (0 h), AGID: 0; Length: 2050
Book Type: DVD-R (2), Part Version: 2.0x (5), Extended Part Version: 0.0 (0)
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: 0 h
End Sector Number in Layer 0: 0 h (LBN: FFFD0000 h, 4193920 MB)
Data in Burst Cutting Area (BCA) does not exist
Start sector number of the current Border-Out: 0 h
Start sector number of the next Border-In: 0 h
Media Specific [16..63]:
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................

22:00:30 #27 Text 0 File Cdrdrv.cpp, Line 1197
22:00:30.052 - I: LITE-ON DVDRW LDW-811S : Queue again later

22:01:28 #28 SPTI -1135 File SCSIPassThrough.cpp, Line 323
I: CdRom0: SCSIStatus(x02) WinError(0) NeroError(-1135)
Sense Key: 0x03 (KEY_MEDIUM_ERROR)
Sense Code: 0x0C
Sense Qual: 0x00
CDB Data: 0x2A 00 00 00 0F 20 00 00 20 00 00 00
Sense Area: 0x70 00 03 00 00 00 00 0A 00 00 00 00 0C
Buffer x054e0000: Len x10000
0x00 00 01 BA 44 00 E4 89 25 57 01 89 C3 F8 00 00
0x01 E0 07 EC 81 00 00 03 60 00 DB E2 2B 14 B6 3A
0xFB 17 F7 76 42 87 B1 63 F9 37 77 B1 04 49 32 68

22:01:28 #29 CDR -1135 File Writer.cpp, Line 302
Write error
I: LITE-ON DVDRW LDW-811S

22:01:28 #30 Text 0 File ThreadedTransfer.cpp, Line 228
all writers idle, stopping conversion

22:01:30 #31 Text 0 File ThreadedTransfer.cpp, Line 222
conversion idle, stopping reader

22:01:30 #32 Text 0 File DVDR.cpp, Line 2978
EndDAO: Last written address was 3871

22:01:30 #33 Phase 34 File dlgbrnst.cpp, Line 1725
Simulation failed at 2x (2,770 KB/s)


Existing drivers:
File 'Drivers\ASPI32.SYS': Ver=4.71 (0002) built by: WinDDK, size=16512 bytes, created 19/07/2004 17:41:48
File 'Drivers\PXHELP20.SYS': Ver=3.00.09a, size=46080 bytes, created 19/08/2005 13:00:00 (Prassi/Veritas driver for win 2K)

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