WLAN disconnects after a while, loses LinNeighborhood share.

[FluffyLabrador]

Hi there, hope someone can help me with my problem:

I am using a WLAN Connection with ndiswrapper, works perfectly - but after a while the thing loses the connection. As soon as I start something that tries to connect to the network from the box, it reconnects.
But I can't connect to it from the outside - also the LinNeighborhood share loses it's connection, and I have to reconnect it by hand.

Is there a way, or a setting which keeps my connection alive ?
Help wanted.

Farewell my fellow puppy-lovers.

F-Lab.