Thanks for response to my posting. The device manager can see the vxi->pci-mxi-2 card, under the driver tab, the date is "12-19-2000", for "Driver File Details"--
-NI-PAL Driver.vxd
|_c:\windows\system\NIPALKD.vxd
the first file is not loaded, the 2nd file loaded fine. I think the unloaded file cause the problem, but I don't know how to fix it. Installation order: Removed the card from "system"-> remove the programs (ni-vxi/visa/ni-pal)-> then shutdown and remove the card-> then start to reinstall the driver-> then reboot-> then shutdown to put the card back-> then reboot.