Wi Fi Android disconnect issue

I have exactly the same issue :
http://forum.unity3d.com/threads/wifi-issues-on-lan-or-android-client-windows-server.336183/

Solution for this issue : "Simply extend the timeout for responses and it sgould work fine"
How can I do it?
I tried extend "NetworkManager.MaxDelay" and "NetworkManager.connectionConfig.DisconnectTimeout"
but nothing help me.

Thanks by advance.