wifi network invisible with DELL vostro 1500 under 8.10
I've got a DELL VOSTRO 1500.
I just update to ubuntu 8.10 but my personal wifi network called "wifiperso" does not appears in the list of the wifi network detected.
So, i have created it manually but i get an error message : "the application "Applet Network Manager" (/usr/bin/nm-applet) want to access to the Keys Manager but it is closed : enter your passwd :"
When i put my passwd, it search the network but i get the message :
"the network has been disconnected".
Thank you for your help!!