Mybook World Edition 500Mb looses network connection

Hello, thanks for your answer but the reset has no effect. Only when I switch of the MBWbut disconnection the powercable and start the MBW again I get about 30s to 1 min of connection and then the network connection is lost again. Trying to reconnect the MBW has no effect. Do you have any more clues what to try?

Thanks, Vincent