I am using a new Sony external burner, DRX500ULX to burn a project in DVD-A onto a DVD-RW. During the past two days, I keep getting an error message during the burning process, which halts it altogether. It had been working fine before. I then installed the Firmware 2.0f update from Sony's site. I keep getting the same error. I contacted Sony, but they will not provide any support since 'they don't support other company's products' (which I thought was funny). BTW, I'm running XP on a P4, 2.4 GHZ with 512 ram on a 40 gig drive. Here's the message:

'SFMMCX'-(17)
'USB/1394 Devices'-(3)
-'SONY DVD RW DRU-500A 2.0f'-(0)
Module sfmmcx.cpp Line 1158
An illegal request was received.
The command is not allowed in the current operational mode.

Status: 00020202
Command: 04 11 00 00 00 00 00 00 00 00 00 00
Sense: 05 2c 00
Info: 00 48 1a a6
Specific: 00 00 00
Extra: 00 00 00 00 00 00 00 00 00 00 00

Can anyone help figure this out? Thanks!