Always "No network connection" even when a network is available

[Sven Garbade <lze arcor de>]

Hi list,

I cannot figure out how to get network manager working, it says always
"No network connection", even when a network is available.

My /etc/init.d/interfaces:

auto lo
iface lo inet loopback

I removed links to /etc/init.d/networking to disable configuring network
devices during booting, created a group "netdev" and added several users
to this group.

My system: Debian Testing, Gnome 2.20.3, Kernel 2.6.20.6, PRO/Wireless
2915ABG (ipw2200 driver),  network-manager 0.6.5-5,
network-manager-applet 0.6.5-3 (for gnome).

Are there any secrets to discover? Thanks, Sven