2007WFP not working with nVidia optimization wizard

Hey, we've got a Precision 390 w/2Gb RAM running XP Pro SP2, connected to a Dell 2007WFP, and we're unable to get the optimization wizard in the nVidia control panel to work.  We get a black screen with various messages displayed (Initialized/success/not initialized/not enough memory), and three buttons, one of which says, "Invalid parameters".

 

We've tried three cards; the Quadro NVS 285, the Quadro FX 570M, and the Quadro FX 1700, and none will work. Driver version is 6.14.11.6255 (or 162.55), the latest driver available from Dell.