LG gsa4163b dvd -r write errror

Hi!
I have a lg gsa 4163b dvd writer with firmware version a105. i use nero 7 premium 2 burn cds. i’m having problems burning on samsung pleomax dvd-r. i couldn’t write at 8x. but it worked fine at 4x. here’s part of the error log.

11:33:20 AM #13 Text 0 File SCSIPassThrough.cpp, Line 34
SPTILockVolume - completed successfully for FCTL_LOCK_VOLUME

11:33:20 AM #14 Phase 24 File dlgbrnst.cpp, Line 1724
Caching of files started

11:33:20 AM #15 Text 0 File Burncd.cpp, Line 4129
Cache writing successful.

11:33:20 AM #16 Phase 25 File dlgbrnst.cpp, Line 1724
Caching of files completed

11:33:20 AM #17 Phase 36 File dlgbrnst.cpp, Line 1724
Burn process started at 8x (11,080 KB/s)

11:33:20 AM #18 Text 0 File ThreadedTransferInterface.cpp, Line 2669
Verifying disc position of item 0 (relocatable, disc pos, no patch infos, orig at #0): write at #0

11:33:20 AM #19 Text 0 File DVDR.cpp, Line 2469
Recording mode: Sequential Recording Mode

11:33:20 AM #20 Text 0 File MMC.cpp, Line 21541
Set BUFE: Buffer underrun protection -> ON

11:33:20 AM #21 Text 0 File DVDR.cpp, Line 2624
Start write address at LBA 0
DVD high compatibility mode: Yes

11:33:20 AM #22 Text 0 File Cdrdrv.cpp, Line 8385
---- 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: 2.1 (33)
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 (LBN: FFFD0000 h, 4193920 MB)
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 30 00 10 20 40 00 00 - 00 00 00 21 00 00 00 00 .0…@…!..
00 02 FE 10 00 02 FF A0 - 00 00 00 00 00 00 00 00 …þ…ÿ…
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 …

11:34:15 AM #23 SPTI -1194 File SCSIPassThrough.cpp, Line 306
CdRom1: SCSIStatus(x02) WinError(0) NeroError(-1194)
Sense Key: 0x03 (KEY_MEDIUM_ERROR)
Sense Code: 0x73
Sense Qual: 0x04
CDB Data: 0x2A 00 00 00 00 00 00 00 20 00 00 00
Sense Area: 0x70 00 03 00 00 00 00 10 32 38 00 0C 73 04
Buffer x04690000: Len x10000
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

11:34:15 AM #24 CDR -1194 File Writer.cpp, Line 302
PMA update failure
H: HL-DT-ST DVDRAM GSA-4163B

11:34:16 AM #25 Text 0 File ThreadedTransfer.cpp, Line 228
all writers idle, stopping conversion

11:34:16 AM #26 Text 0 File ThreadedTransfer.cpp, Line 222
conversion idle, stopping reader

11:34:16 AM #27 Text 0 File DVDR.cpp, Line 2866
EndDAO: Last written address was -1

11:34:35 AM #28 CDR -1194 File WriterStatus.cpp, Line 167
PMA update failure
H: HL-DT-ST DVDRAM GSA-4163B

11:34:35 AM #29 TRANSFER -24 File WriterStatus.cpp, Line 167
Could not perform end of Disc-at-once

11:34:35 AM #30 Phase 38 File dlgbrnst.cpp, Line 1724
Burn process failed at 8x (11,080 KB/s)

Existing drivers:
File ‘Drivers\ASPI32.SYS’: Ver=4.60 (1021), size=25244 bytes, created 9/10/1999 2:06:00 PM
File ‘Drivers\PXHELP20.SYS’: Ver=2.03.28a, size=20640 bytes, created 3/12/2005 1:28:13 AM (Prassi/Veritas driver for win 2K)
File ‘Drivers\scsiport.sys’: Ver=5.1.2600.2180 (xpsp_sp2_rtm.040803-2158), size=96256 bytes, created 8/3/2004 10:59:42 PM (Adapter driver for src)

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

need help…

hi, need the first bit of that section of log, from here “====== *** Nero-Burning Rom, History File *** ======”