Well... I tried it & some other solutions but none works I don't know why....!!
I used to play many other online games without any mention and it was all working fine and this is the 1st time to happen.
Anyway thanks for the support and maybe I will find a way to solve it myself someday/somehow... I hope that because I want to join a friend to me who invited me to play this server but I can't until I find a solution
In case you found something which can help to solve this, Just let me know & I will try it
Thanks again