Thanks for the suggestions.
Here's the log:
I 09:29:15 ImgBurn Version 2.1.0.0 started!
I 09:29:15 Microsoft Windows XP Media Center Edition (5.1, Build 2600 : Service Pack 2)
I 09:29:16 Initialising SPTI...
I 09:29:16 Searching for SCSI / ATAPI devices...
I 09:29:16 Found 1 DVD-ROM/CD-RW!
I have some recorded movies on the same Sony DVD-R's that play fine in the drive. So maybe it is the firmware? I'm also gonna grab some Verbatims and Taiyos and see if that helps.
I have no experience updating firmware so I need to do some research on that first...