Where do you have this set? Did you make sure it is applied to the system
Yes, it was applied in the system...

Out of curiosity, what is your system doing that depends on this change?

The problem is that one application need to use a lot of socket of the system... if not set free can't used again until "extra" time wait it's over. 120 seconds it's too much for this application

Thanks for your answer, appreciate that.