When using the Parallel Cable IV or MultiPRO Cable on the Windows Vista platforms, the following message is displayed in the iMPACT log when opening the cable:
"Your driver installation is not complete. Please run iMPACT as an administrator to complete the installation"
When this happens, the cable only connects in compatibility mode.
The following work-around can be used to complete the installation of the cable drivers:
1. From the Vista Desktop, navigate to All Programs -> Xilinx ISE 9.2i -> Accessories -> iMPACT.
2. Right-click on the iMPACT icon and select Run as administrator.
3. From iMPACT's main screen, select Output -> Cable Setup, select the Parallel IV radio button, and then select OK. This step should complete the installation of the xpc4drvr driver.
This problem will be fixed in the next major release of the ISE design tools.