Also, here is the imgburn log of the burning process:
I 11:12:44 ImgBurn Version 2.4.2.0 started!
I 11:12:44 Microsoft Windows Vista Home Premium Edition (6.0, Build 6001 : Service Pack 1)
I 11:12:44 Total Physical Memory: 1,833,420 KB - Available: 1,225,828 KB
I 11:12:44 Initialising SPTI...
I 11:12:44 Searching for SCSI / ATAPI devices...
I 11:12:44 Found 1 DVD-ROM and 1 DVD