I've just installed on my Debian Sid with XFCE4 network manager, but I have a problem, no wireless connection are shown. What Should I do? I used to use wicd but I had problems to connect to free wifi :S I don' t know why.
However now I'm connected from terminal, but I don't know why connections aren't shown in network manager..
Sameone can help me? Thank you.
EDIT:
Now is showing but network manager gives me this error:

EDIT2:
My /etc/network/interfaces
auto lo
iface lo inet loopback
/etc/network/interfaces? It may be thatwicdadded stanzas to manage the wireless interface from within that file. Debian's network manager refuses to look at an interface that is managed from within/etc/network/interfaces. – Joseph R. Mar 2 at 0:00