losing connection on n800
 

I've been losing my connection on my n800. I have a wpa protected wlan connection in my apt and I keep a connection for a little while, but then lose it. It says that I'm still connected, but whenever I try and connect to a website it says that it cannot connect to the remote server, and it also says that google chat has had a network error and is disconnected so I have to disconnect from the wlan and then get right back on and it's just fine again. I suppose that I can do this, but I would prefer that it just work.. is there anyone that has experienced this and fixed it? or does anyone have a solution?