How to fix muting incoming calls with volume buttons iOS 5.0.1

This is how to fix volume buttons when you're not able to mute incoming calls using them,

If you are on iOS 5.0.1 and facing the problem, and you just see volume indicators when you hit the up or down volume button, then cydia app "activator" is causing you the problem, if you have the old version for "activator" 1.5.8 - all you have to do is upgrading "activator" to the new version 1.6.0 which has been released today 1st January 2012

I have been facing the problem since I have jailbreken my iPhone 4 but not it's working perfectly.

For any questions , contact me on twitter @eminemmm