Traveler doesn't work on a desktop

[sblogin]

After having used it with very success on a Centrino and on a Turion laptops, I have decided to use my traveler with my desktop.
Looking for the last XP drivers I have read about the 1.07 firmware and so I have load 3.6.7.3 drivers, than connected the traveler and updated the firmware.
To connect it I have bought a PCI-express Digitus Firewire card (Texas Intruments).
The connection looks working as the firmware was updated and the PC recognize when the Traveler is on. I can also change the sample rate and the clock from internal to wathever else (of course I use the INTERNAL position anyway!) but I can't enable any output on the MOTU cuemix console. If I try to change it, it returns to "disabled" and the fader to "-inf".
Anybody could help me?
thanks
Sergio