I found the issue was that the layer break wasnt set correctly and now that it is it worked perfectly. As for the media i have used verbatim, memorex (not to good) and TDK (ritek i believe) and so far the TDK discs have worked as well as the verbatims ive used but i only bought them because they were $20 on sale.
Try burning at 4x. You might also want to try a lens cleaning disc on that burner.
If all that doesn't help then please read this -> http://forum.imgburn.com/index.php?showtopic=8000
Ok ill try cleaning the lens and burning at a different speed. The discs i have been using have worked flawlessly ive only coastered 2-3 and those were my fault for applying an incorrect setting so i really dont think its then discs im using.
I 19:07:12 ImgBurn Version 2.5.0.0 started!
I 19:07:12 Microsoft Windows Vista Ultimate Edition (6.0, Build 6002 : Service Pack 2)
I 19:07:12 Total Physical Memory: 3,142,980 KB - Available: 1,681,780 KB
I 19:07:12 Initialising SPTI...
I 19:07:12 Searching for SCSI / ATAPI devices...
I 19:07:13 Found 1 DVD