This is a typical log file for the failure that I get:
I 17:34:26 ImgBurn Version 2.4.0.0 started!I 17:34:26 Microsoft Windows Vista Ultimate Edition (6.0, Build 6001 : Service Pack 1) I 17:34:26 Total Physical Memory: 4,191,884 KB - Available: 2,304,740 KB I 17:34:26 Initialising SPTI... I 17:34:26 Searching for SCSI / ATAPI devices... I 17:34:26 Found 2 DVD-ROMs and 1 DVD