I read your post and tried to burn CD iso, all went ok!
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; ImgBurn Version 2.3.2.0 - Log
; Tuesday, 19 June 2007, 14:43:10
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I 14:36:19 ImgBurn Version 2.3.2.0 started!
I 14:36:19 Microsoft Windows XP Home Edition (5.1, Build 2600 : Service Pack 2)
I 14:36:19 Total Physical Memory: 1,048,028 KB - Available: 445,752 KB
W 14:36:19 AnyDVD can interfere with ImgBurn's ability to verify accurately, please ensure it's disabled!
I 14:36:19 Initialising SPTI...
I 14:36:19 Searching for SCSI / ATAPI devices...
I 14:36:19 Found 1 DVD-ROM, 1 DVD