I have the same problem. I am using Debian etch on a Dell laptop with an ipw2200 wireless card. The kernel is a custom 2.6.20.
I have networkmanager and wpa_supplicant installed... nm works fine with wired and unsecured wireless networks, but not WPA (WEP doesn't work either, by the way). It sees the network, asks for the passkey, then fails to connect. I read through this here
http://doc.gwos.org/index.php/Network_Manager_with_WPA
but it's a little old and I don't think it really applies to me. It seems like everything's installed and working, but it won't connect. Anyone know where to start?
Thanks