Salute!
Thanks for the help

(Here Too ...)
Sorry Kankkis, I don't want to hijack your thread.
After you solved my G940 problem, I found something
I found a small program, called ForceTest.exe ... You can set up any FFB effect (like Centering Spring effect ...) and test it ... It works well with G940 under Win 7 x64 bit ...
If you start this SW before CoD, you can adjust your centering spring force easily

Just set up the necessary force, and click the radiobutton ... (Changing the force not "on the fly" unfortunately ... everybody need to discover it

)
Here is a link, and my settings:
http://www.fs-force.com/support.htm#ForceTest
I hope it will be helpful ...