PT 8 crashes computer when changing the sync to SPDIF

[RuffinMedia]

I'm trying to sync my 2 systems together:
ProTools 9 MacPro with 002r (Master) with Protools 8.05LE PC MBox 2 (Slave).

Changing the Clock source to SPDIF (on my PC) crashed my PC. Am I doing something wrong? I was told that if I want to sync 2 machines together I would have to send SPDIF and MTC (from my Mac aka Master) to my PC. I was told I had to do the following steps.

1. I should change the Clock Source to S/PDIF in the Hardware Setup menu on my PC.
2. Make sure that it reads S/PDIF in the clock source tab (in the Session Setup Menu)on my PC.
3. Select the Peripherals Menu\Synchronization and change the MTC Reader Port to my Midi In on my MBOX 2 on my PC.
4. Select the Peripherals Menu\Synchronization and change it to MTC Generator to my 002r Midi out on my MacPro.

That should work (or am i missing something)?