Marc -
Your software installation should be good to go, but I am still concerned about your hardware.
I suggest you take a look at this 'Integration Recipe' to make sure that your xw8600 is configured properly:
http://www.matrox.com/video/en/support/axiole/design/computer/validated/pci...
Regards,
Lyn Norstad
Chicagoland, USA
Co-host of CreativeCOW forums:
Matrox Video Systems
Leitch dpsVelocity