Osama Mahdi wrote: > but if the device is not in up state, why when I used ( iwlist scan ) I > was able to find many networks? I think that mean the device is > definetly up but it could not connect to the wireless network. Certainly the device must be up if iwlist scan returns something. I only thought it was not up because you said ifup failed. > do u know the system file where the wireless encoding configuration is > stored? I think this will help solving my problem. I think it depends very much if you are using NetworkManager or not. If you are not, then the information is stored in /etc/sysconfig/network-scripts/ifcfg-wlan0 (in your case), I believe. -- Timothy Murphy e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland