Cannot change the value for "Resource Throttling" in SharePoint 2010

Hi Guys,

I'm farm admin in SharePoint 2010 farm and I tried to change resouce throttle value from CA but I failed.
I tried to do it manually, I changed thev value, and saved it but when I opened the resource throttle form I saw the value had not changed whether I change to a higher or lower value.

I tried to run script which I found somewhere and the script ran successfuly but nothing changed.

Evrey time I do a change I ran iisreset and sometimes I restarted the server but still the same result.
I even created a new web application and tried to change the resource throttle but nothing been changed.

Have you any idea why or how to resolve the issue?

Best regards

Ashraf