Hello,
Thanks for the replies...
The WLAN in fritz still on (Light on, and on in web interface)
The clients still see the FB wireless, however i cannot communicate!!
The wireless still connected, however no communication is possible.
Just a reboot on the wlan of the FB solve the problem... Rebooting the client do not take effect!
I cannot try with WPA2 since the client do not support it.
Best regards