i need help finding out what is wrong with my software or why i continually keep getting errors when trying to burn dvd-rw's the log is as follows:

Windows XP 5.1
IA32
WinAspi: -
ahead WinASPI: File 'C:\Program Files\Nero\Nero 7\Core\Wnaspi32.dll': Ver=2.0.1.74, size=164112 bytes, created 2/11/2004 12:54:32 PM

NT-SPTI used
Nero Version: 7.0.1.2
Internal Version: 7, 0, 1, 2
(Nero Express)
Recorder: <PIONEER DVD-RW DVR-K15RA>Version: 1.04 - HA 1 TA 0 - 7.0.1.2
Adapter driver: <IDE> HA 1
Drive buffer : 2000kB
Bus Type : via Inquiry data (1) -> ATAPI, detected: ?
Connected to MMC as unknown drive with class-nr : 1
Drive is autodetected - recorder class: Std. MMC recorder
CD-ROM: <PIONEER DVD-RW DVR-K15RA>Version: 1.04 - HA 1 TA 0 - 7.0.1.2
Adapter driver: <IDE> HA 1

=== Scsi-Device-Map ===
DiskPeripheral : IC25N060ATMR04-0 atapi Port 0 ID 0 DMA: On
CdRomPeripheral : PIONEER DVD-RW DVR-K15RA atapi Port 1 ID 0 DMA: On
CdRomPeripheral : JI5435S VMZ570O 1.0 dtscsi Port 2 ID 0 DMA: Off

=== CDRom-Device-Map ===
PIONEER DVD-RW DVR-K15RA E: CDRom0
JI5435S VMZ570O F: CDRom1
=======================

AutoRun : 1
Excluded drive IDs:
WriteBufferSize: 66060288 (0) Byte
ShowDrvBufStat : 0
BUFE : 0
Physical memory : 445MB (456176kB)
Free physical memory: 88MB (91056kB)
Memory in use : 80 %
Uncached PFiles: 0x0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

12.3.2006
ISO compilation
4:29:25 PM #1 Text 0 File Isodoc.cpp, Line 6411
Iso document burn settings
------------------------------------------
Determine maximum speed : FALSE
Simulate : FALSE
Write : TRUE
Finalize CD : FALSE
Multisession : TRUE
Multisession type: : Start multisession
Burning mode : DAO
Mode : 1
ISO Level : 1 (Max. of 11 = 8 + 3 char)
Character set : ISO 9660
Joliet : TRUE
Allow pathdepth more than 8 directories : TRUE
Allow more than 255 characters in path : TRUE
Write ISO9660 ;1 file extensions : TRUE

4:29:25 PM #2 Text 0 File ThreadedTransfer.cpp, Line 525
ReadBuffer-Pipe got 64512KB of Memory

4:29:25 PM #3 Text 0 File Reader.cpp, Line 124
Reader running

4:29:25 PM #4 ISO9660GEN -11 File Geniso.cpp, Line 3312
First writeable address = 0 (0x00000000)

4:29:25 PM #5 Text 0 File Burncd.cpp, Line 3302
Turn on Disc-At-Once, using DVD media

4:29:26 PM #6 Text 0 File DlgWaitCD.cpp, Line 279
Last possible write address on media: 2295103 (510:01.28, 4482MB)
Last address to be written: 358975 ( 79:46.25, 701MB)

4:29:26 PM #7 Text 0 File DlgWaitCD.cpp, Line 291
Write in overburning mode: NO (enabled: CD)

4:29:26 PM #8 Text 0 File DlgWaitCD.cpp, Line 2578
Recorder: PIONEER DVD-RW DVR-K15RA, Media type: DVD+RW
Disc Manufacturer ID: SONY, Media Type ID: S11, Product revision number: 0
Disc Application Code: 0, Extended Information Indicators: 1

4:29:26 PM #9 Text 0 File DlgWaitCD.cpp, Line 458
>>> Protocol of DlgWaitCD activities: <<<
=========================================

4:29:26 PM #10 Text 0 File ThreadedTransferInterface.cpp, Line 847
Setup items (after recorder preparation)
0: TRM_DATA_MODE1 ()
2 indices, index0 (150) not provided
original disc pos #0 + 358976 (358976) = #358976/79:46.26
relocatable, disc pos for caching/writing not required/ required, no patch infos
-> TRM_DATA_MODE1, 2048, config 0, wanted index0 0 blocks, length 358976 blocks [E: PIONEER DVD-RW DVR-K15RA]
--------------------------------------------------------------

4:29:26 PM #11 Text 0 File ThreadedTransferInterface.cpp, Line 1059
Prepare recorder [E: PIONEER DVD-RW DVR-K15RA] for write in CUE-sheet-DAO
DAO infos:
==========
MCN: ""
TOCType: 0x00; Session Closed, disc not fixated
Tracks 1 to 1:
1: TRM_DATA_MODE1, 2048/0x00, FilePos 0 0 735182848, ISRC ""
DAO layout:
===========
__Start_|____Track_|_Idx_|_CtrlAdr_|_RecDep__________
0 | lead-in | 0 | 0x41 | 0x00
0 | 1 | 0 | 0x41 | 0x00
0 | 1 | 1 | 0x41 | 0x00
358976 | lead-out | 1 | 0x41 | 0x00

4:29:26 PM #12 Text 0 File SCSIPassThrough.cpp, Line 36
SPTILockVolume - completed successfully for FCTL_LOCK_VOLUME

4:29:26 PM #13 Phase 24 File dlgbrnst.cpp, Line 1725
Caching of files started

4:29:26 PM #14 Text 0 File Burncd.cpp, Line 4132
Cache writing successful.

4:29:26 PM #15 Phase 25 File dlgbrnst.cpp, Line 1725
Caching of files completed

4:29:26 PM #16 Phase 36 File dlgbrnst.cpp, Line 1725
Burn process started at 4x (5,540 KB/s)

4:29:26 PM #17 Text 0 File ThreadedTransferInterface.cpp, Line 2685
Verifying disc position of item 0 (relocatable, disc pos, no patch infos, orig at #0): write at #0

4:29:26 PM #18 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+RW (9), Part Version: 1.1x (2)
Disc Size: 120 mm, Maximum Rate: <not specified> (F h)
Number of Layers: 1, Track Path: Parallel Track Path (PTP), Layer Type: re-writable
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: 26053F h
End Sector Number in Layer 0: 0 h (LBN: FFFD0000 h, 4193920 MB)
Data in Burst Cutting Area (BCA) does not exist
Disc Application Code: 0 / 0 h
Extended Information indicators: 1 h
Disc Manufacturer ID: SONY....
Media type ID: S11
Product revision number: 0
Number of Physical format information bytes in use in ADIP up to byte 63: 57
Media Specific [16..63]:
00 00 01 53 4F 4E 59 00 - 00 00 00 53 31 31 00 39 ...SONY....S11.9
23 00 B4 72 68 02 24 00 - AE 75 58 02 28 00 B2 73 #..rh.$..uX.(..s
62 02 24 04 12 10 E0 10 - F0 00 00 00 00 00 00 00 b.$.............

4:29:26 PM #19 Phase 98 File dlgbrnst.cpp, Line 1725
Start formatting disc before burning

4:30:12 PM #20 SPTI -1505 File SCSIPassThrough.cpp, Line 323
E: CdRom0: SCSIStatus(x02) WinError(0) NeroError(-1505)
Sense Key: 0x03 (KEY_MEDIUM_ERROR)
Sense Code: 0x31
Sense Qual: 0x01
CDB Data: 0x00 00 00 00 00 00 00 00 00 00 00 00
Sense Area: 0x71 00 03 FF FF 00 B8 0E 00 00 00 00 31 01

4:30:12 PM #21 Phase 101 File dlgbrnst.cpp, Line 1725
Formatting disc failed

4:30:12 PM #22 Text 0 File DVDPlusRW.cpp, Line 666
Start write address at LBA 0
DVD high compatibility mode: Yes

4:30:12 PM #23 CDR -1505 File ThreadedTransferInterface.cpp, Line 1799
Medium format failed
E: PIONEER DVD-RW DVR-K15RA

4:30:12 PM #24 TRANSFER -27 File ThreadedTransferInterface.cpp, Line 1799
Could not perform start of Disc-at-once

4:30:12 PM #25 Phase 38 File dlgbrnst.cpp, Line 1725
Burn process failed at 4x (5,540 KB/s)

Nero is failing when trying to format the rewritable media.
Try doing a 'full erase' of the disc before writing the image.
If this doesn't work, try another media.