I use sles 12.1, with gnome
the network manager is networkmanager without ipv6.

I use the wifi key D-Link dwa-110(driver rt73usb)
I removed the wifi key and now its light is off.
the tray icon shows me 2 computer screens and a red cross telling me there is no wireless network detected, although a mac and a windows computers can connect to the router, a livebox with WEP key.

can you help me?

the command hwinfo is telling me that the device usb 0x03c07, "802.11 bg WLAN" is recognised, with the config status : active=unknown, cfg=new, avail=yes, need=no