Dual Core Processors FS2004 USING Vista (Ultimate)

Hi

I have read the post about using FS2004 on a dual core processor:

https://forum.flyawaysimulation.com/forum/topic/21628/dual-core-processors/

The problem is: I have Vista Ultimate and i have tried doing the same thing, and nothing happens, still using CPU0 instead of sharing the load over CPU0 & CPU1.

Anyone know any solutions?

Dan