I know this question has probably been asked millions of times but i have been having this same problem for a long time and with all different programs like clonecd, nero and about 4 other programs.
This is the log for one of my burn attempts :
; //****************************************\\
; ImgBurn Version 2.4.0.0 - Log
; Sunday, 30 March 2008, 12:41:33
; \\****************************************//
;
;
I 12:38:56 ImgBurn Version 2.4.0.0 started!
I 12:38:56 Microsoft Windows Vista Home Premium Edition (6.0, Build 6000)
I 12:38:56 Total Physical Memory: 1,570,688 KB - Available: 875,772 KB
I 12:38:56 Initialising SPTI...
I 12:38:56 Searching for SCSI / ATAPI devices...
I 12:38:56 Found 1 DVD