Allright, now I've updated the burner firmware to the latest (1.11) and Imgburn to version 2.5.0.0 and I'm still getting the following log:
I 10:00:11 ImgBurn Version 2.5.0.0 started!
I 10:00:12 Microsoft Windows XP Home Edition (5.1, Build 2600 : Service Pack 2)
I 10:00:12 Total Physical Memory: 523.760 KB - Available: 80.512 KB
I 10:00:12 Initialising SPTI...
I 10:00:12 Searching for SCSI / ATAPI devices...
I 10:00:12 Found 2 DVD-ROMs and 1 DVD±RW!
I 10:05:47 Operation Started!
I 10:05:47 Source File: D:\xavi\Downloads\need for speed shift\x360sos.com.nfsunder.pal.dvd
I 10:05:47 Source File Sectors: 3.827.488 (MODE1/2048)
I 10:05:47 Source File Size: 7.838.695.424 bytes
I 10:05:47 Source File Volume Identifier: DVD_ROM
I 10:05:47 Source File Volume Set Identifier: 356fc000MS UDFBridge
I 10:05:47 Source File Application Identifier: CDIMAGE 2.45 (12/06/2000 TM)
I 10:05:47 Source File Implementation Identifier: Microsoft CDIMAGE UDF
I 10:05:47 Source File File System(s): ISO9660; UDF (1.50)
I 10:05:47 Destination Device: [1:1:0] AOPEN DUW1608/ARR A110 (F:) (ATA)
I 10:05:47 Destination Media Type: DVD+R DL (Disc ID: MKM-003-00) (Speeds: 4x)
I 10:05:47 Destination Media Sectors: 4.173.824
I 10:05:47 Write Mode: DVD
I 10:05:47 Write Type: DAO
I 10:05:47 Write Speed: 2,4x
I 10:05:47 Link Size: Auto
I 10:05:47 Lock Volume: Yes
I 10:05:47 Test Mode: No
I 10:05:47 OPC: No
I 10:05:47 BURN-Proof: Enabled
W 10:05:47 Write Speed Miscompare! - Wanted: 3.324 KB/s (2,4x), Got: 5.540 KB/s (4x)
I 10:05:47 Book Type Setting: DVD+R
I 10:05:47 User Specified L0 Data Zone Capacity: 1.913.760
E 10:06:33 Set L0 Data Zone Capacity Failed! - Reason: Unknown (ASC: 0x91, ASCQ: 0xC1)
E 10:06:33 Operation Failed! - Duration: 00:00:45
I 10:06:33 Average Write Rate: N/A - Maximum Write Rate: N/A
Thank you very much for your help, hope we can find a solution.
PD: What does de black/dark part of the log mean?