The full log of the failed burn would also help us alot. Help Menu > Logs
11:19:40 ImgBurn Version 2.3.2.0 started!
I 11:19:40 Microsoft Windows Vista Home Basic Edition (6.0, Build 6000)
I 11:19:40 Total Physical Memory: 513,600 KB - Available: 122,396 KB
I 11:19:40 Initialising SPTI...
I 11:19:40 Searching for SCSI / ATAPI devices...
I 11:20:10 Found 1 DVD±RW/RAM!
I 11:48:14 Close Request Acknowledged
I 11:48:14 Closing Down...
I 11:48:14 Shutting down SPTI...
I 11:48:15 ImgBurn closed!