That's my post there. From the time when i didn't know about the wlan_sleep_timeout yet.
After that i installed firmware that allows me to hide the SSID and that solved the problem. Don't ask me for the technical background of why this worked, because i don't know.
What i do know is that La Fonera is a crap router (this problem, problem with iodined, and more) the way it is used now. I don't have the knowledge to understand if it's the hardware or the way the OS is managed, but what i do know is that i'm looking for a simple Wifi router that works. Internet sharing or no internet sharing, the most important for me is that I can use internet and with the Fonera and the N800 that seems to be a problem.

Ton.