I get the same results with imgburn and dvd decrypter, windows 7 or vista. Here is the log:
I 22:35:54 DVD Decrypter Version 3.5.4.0 started!
I 22:35:54 Media Center Edition (6.1, Build 7100)
I 22:35:54 Initialising SPTI...
I 22:35:54 Searching for SCSI / ATAPI devices...
I 22:35:54 Found 1 DVD-RAM/