Update your burner's firmware (remove any disc and close the tray before updating then reboot after it's finished). Try burning at 4x. If that doesn't work, then try a lens cleaning disc on that drive.
If all that doesn't help then please read this -> http://forum.imgburn.com/index.php?showtopic=8000
tried that and it happened again, it might be the courrupted files but i redownloaded them to make sure, heres the new error logs:
; //****************************************\\
; ImgBurn Version 2.5.0.0 - Log
; Wednesday, 19 August 2009, 12:27:58
; \\****************************************//
;
;
I 12:23:14 ImgBurn Version 2.5.0.0 started!
I 12:23:14 Microsoft Windows Vista Ultimate Edition (6.0, Build 6000)
I 12:23:14 Total Physical Memory: 2,085,884 KB - Available: 1,092,004 KB
I 12:23:14 Initialising SPTI...
I 12:23:14 Searching for SCSI / ATAPI devices...
I 12:23:14 Found 1 DVD