OES 11, iPrint client 5.82, WinXP (32bit) and Win7 (64bit)

I was setting up a new KIP 7700 series plotter. Everything works fine
in Windows 7 (uploading, creating profile, installing). I uploaded
the XP driver to the driver store and it appears to uplod without
error. But if anyone installs it, it doesn't work. And when I tried
to create the Printer Driver Profile in iManager, I get the following

Error: Create Printer Driver Profile Failure
Error occurred configuring driver.

I have deleted and uploaded the driver multiple times. I have also
tried recreating the driver using PDRVGen.exe, but that didn't help.
Any suggestions?