Problems with wireless ad-hoc networks

Hey guys,

So I am having a problem.
Me and some friends play games on LAN by creating and joining wireless ad-hoc networks. All was fine a few days ago, but now i am having some problems with connectivity. I get disconnected from other players after a while.

We play Age of Empires 2. Sometimes I can't find the game server while other can join just fine, and when I can join a game, after a while of playing the game gets stuck and a "Waiting for players " window shows up. I cannot see the ping of other players which signifies I disconnected but others can see my ping just fine. This problem mostly occurs when there are more than 3 players. This problems occurs in other games also like Company of Heroes where a sync error shows up and in Counter strike where I can't find the servers.
I also noticed that when I connect to the ad-hoc everything works fine for a while before the problem occurs.
this is a new problem, I wasn't having these obstructions before a few days ago where even 8 players played just fine.

i have up-to-date drivers (i think.), i re-installed my WLAN drivers too. I've tried troubleshooting , works for a while then the problem resurfaces.

Please Help.

Thanks in advance