6.04 can't change sample rate inside cubase


did anyone get that issue?
When I’m inside cubase I can’t change the sample rate of my sound card.
In the project option when I put another sample rate, font become yellow and the sample rate was not changed.
To change sample rate I need to exit from cubase, change the sample rate on the control panel of my sound card,
then open cubase again and work with this sample rate forever.
At the same time when I’m inside cubase the sample rate on the control panel of my sound card becomes gray
and I can’t change it anymore.

I’m working with windows 7 64bits, and I tried with 2 different sound cards (last drivers).
I tried with a M-audio profire 2626 and with a motu 828mk2.

If I use cubase 5.5.3 64bits it works with the 2 sound cards, but not with cubase 5.5.3 32bits and
not with cubase 6.0.4 64bits and 32bits.

Did anyone get that sample rate issue?

I am still able to change SR from Cubase project setup window.
(Cubase 6.0.4 32 bit on Windows XP64 + RME Fireface 800 or M-Audio Audiophile 2496)

Not certain if this will help but is your C6 set to release driver when in background?

Thanks, but I tried it with no effect.

Steingerg support asked me to trash the preferences folder, and it worked.