Tom,
Can you write to this drive using any CD-R program? Such as EZ CD Creator or is it only Microstudio that is giving you problems?
Does it give you any error messages or what does it do exactly when you do try to write to it?
This honestly sounds like a hardware problem to me, and I am at a loss as to what part, but you have replaced the card and that didn't do the trick.
When it is plugged into the USB 1.1 are you able to write?
Tom, also try making sure that you have updated to the Windows XP Service Pack 1, by running the Windows Update from the Start Menu.
Make sure that you have updated all of the drivers for this system that are located on Sony's website at
http://www.ita.sel.sony.com/support/...9/softupdates/
One for sure that you need to have done is the Bios upgrade, should be the top item. This was updated on 9/19/02.