I'm guessing the burner is toast - tried to even burn a dvd image many times using imgburn, here is my log:
I 15:31:47 ImgBurn Version 2.5.7.0 started!
I 15:31:47 Microsoft Windows XP Home Edition (5.1, Build 2600 : Service Pack 3)
I 15:31:47 Total Physical Memory: 785,200 KB - Available: 417,892 KB
I 15:31:47 Initialising SPTI...
I 15:31:48 Searching for SCSI / ATAPI devices...
I 15:31:55 -> Drive 1 - Info: BENQ DVD DD DW1620 B7W9 (E:) (ATA)
I 15:31:57 -> Drive 2 - Info: Lite-On LTN486S 48x Max YDS8 (D:) (ATA)
I 15:31:57 Found 1 CD-ROM and 1 DVD±RW!
I 15:33:53 Operation Started!
I 15:33:53 Source File: C:\AAA1\ratDVD-3399.nrg
I 15:33:53 Source File Sectors: 2,290,848 (MODE1/2048)
I 15:33:53 Source File Size: 4,691,656,704 bytes
I 15:33:53 Source File Volume Identifier: ratDVD-3399
I 15:33:53 Source File Volume Set Identifier: 414F7A3BBEB085C4
I 15:33:53 Source File Implementation Identifier: Nero
I 15:33:53 Source File File System(s): UDF (1.02)
I 15:33:53 Destination Device: [1:1:0] BENQ DVD DD DW1620 B7W9 (E:) (ATA)
I 15:33:53 Destination Media Type: DVD+R (Disc ID: RITEK-F16-01)
I 15:33:53 Destination Media Supported Write Speeds: 2.4x, 4x, 8x, 12x, 16x
I 15:33:53 Destination Media Sectors: 2,295,104
I 15:33:53 Write Mode: DVD
I 15:33:53 Write Type: DAO
I 15:33:53 Write Speed: 4x
I 15:33:53 DVD+R Reserve Track: No
I 15:33:53 Link Size: Auto
I 15:33:53 Lock Volume: Yes
I 15:33:53 Test Mode: No
I 15:33:53 OPC: No
I 15:33:53 BURN-Proof: Enabled
I 15:33:53 Write Speed Successfully Set! - Effective: 5,540 KB/s (4x)
I 15:33:53 Book Type Setting: DVD-ROM
I 15:33:53 Advanced Settings - WOPC: Yes
I 15:33:53 Filling Buffer... (20 MB)
I 15:33:54 Writing LeadIn...
I 15:34:15 Writing Session 1 of 1... (1 Track, LBA: 0 - 2290847)
I 15:34:15 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 2290847)
W 15:34:25 Failed to Write Sectors 17632 - 17663 - Reason: Write Error
W 15:34:25 Retrying (1 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (2 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (3 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (4 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (5 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (6 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (7 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (8 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (9 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (10 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (11 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (12 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (13 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (14 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:25 Retrying (15 of 20)...
W 15:34:25 Retry Failed - Reason: Invalid Address For Write
W 15:34:26 Retrying (16 of 20)...
W 15:34:26 Retry Failed - Reason: Invalid Address For Write
W 15:34:26 Retrying (17 of 20)...
W 15:34:26 Retry Failed - Reason: Invalid Address For Write
W 15:34:26 Retrying (18 of 20)...
W 15:34:26 Retry Failed - Reason: Invalid Address For Write
W 15:34:26 Retrying (19 of 20)...
W 15:34:26 Retry Failed - Reason: Invalid Address For Write
W 15:34:26 Retrying (20 of 20)...
W 15:34:26 Retry Failed - Reason: Invalid Address For Write
E 15:34:28 Failed to Write Sectors 17632 - 17663 - Reason: Write Error
E 15:34:28 Next Writable Address: 17216
I 15:34:28 Synchronising Cache...
W 15:34:33 User opted to skip the 'Close Track/Session/Disc' functions.
E 15:34:33 Failed to Write Image!
I 15:34:38 Exporting Graph Data...
I 15:34:38 Graph Data File: C:\Documents and Settings\Owner\Application Data\ImgBurn\Graph Data Files\BENQ_DVD_DD_DW1620_B7W9_MONDAY-OCTOBER-15-2012_3-33_PM_RITEK-F16-01_4x.ibg
I 15:34:38 Export Successfully Completed!
E 15:34:38 Operation Failed! - Duration: 00:00:39
I 15:34:38 Average Write Rate: 2,938 KB/s (2.1x) - Maximum Write Rate: 7,007 KB/s (5.1x)