dmesg attached.

Today I cannot connect to my home wireless at all. It uses WEP. Since installing hardy I've always been able to connect to my girlfriend's home network, which uses WPA.

I'm getting lines like this in my system log:
24/03/08 13:08:27	naught101-laptop	avahi-autoipd(wmaster0)[7213]	Found user 'avahi-autoipd' (UID 104) and group 'avahi-autoipd' (GID 112).
24/03/08 13:08:27	naught101-laptop	avahi-autoipd(wmaster0)[7213]	Interface not suitable.
24/03/08 13:08:27	naught101-laptop	avahi-autoipd(wmaster0)[7213]	Successfully called chroot().
24/03/08 13:08:27	naught101-laptop	avahi-autoipd(wmaster0)[7213]	Successfully dropped root privileges.
24/03/08 13:08:27	naught101-laptop	dhclient	No DHCPOFFERS received.
24/03/08 13:08:27	naught101-laptop	dhclient	No working leases in persistent database - sleeping.
24/03/08 13:08:27	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation. 
24/03/08 13:08:57	naught101-laptop	none	last message repeated 30 times
24/03/08 13:09:57	naught101-laptop	none	last message repeated 60 times
24/03/08 13:10:42	naught101-laptop	none	last message repeated 45 times
24/03/08 13:10:43	naught101-laptop	dhclient	DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4
24/03/08 13:10:46	naught101-laptop	none	last message repeated 3 times
24/03/08 13:10:47	naught101-laptop	dhclient	DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 9
24/03/08 13:10:55	naught101-laptop	none	last message repeated 8 times
24/03/08 13:10:56	naught101-laptop	dhclient	DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10
24/03/08 13:11:05	naught101-laptop	none	last message repeated 9 times
24/03/08 13:11:06	naught101-laptop	dhclient	DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
24/03/08 13:11:13	naught101-laptop	none	last message repeated 7 times
24/03/08 13:11:14	naught101-laptop	dhclient	No DHCPOFFERS received.
24/03/08 13:11:14	naught101-laptop	dhclient	No working leases in persistent database - sleeping.
24/03/08 13:11:45	naught101-laptop	none	last message repeated 31 times
24/03/08 13:12:29	naught101-laptop	none	last message repeated 44 times
24/03/08 13:12:30	naught101-laptop	dhclient	DHCPDISCOVER on wmaster0 to 255.255.255.255 port 67 interval 5
24/03/08 13:12:30	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation. 
24/03/08 13:12:34	naught101-laptop	none	last message repeated 4 times
24/03/08 13:12:35	naught101-laptop	dhclient	DHCPDISCOVER on wmaster0 to 255.255.255.255 port 67 interval 14
24/03/08 13:12:35	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation. 
24/03/08 13:12:48	naught101-laptop	none	last message repeated 12 times
24/03/08 13:12:49	naught101-laptop	dhclient	DHCPDISCOVER on wmaster0 to 255.255.255.255 port 67 interval 10
24/03/08 13:12:49	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation. 
24/03/08 13:12:58	naught101-laptop	none	last message repeated 9 times
24/03/08 13:12:59	naught101-laptop	dhclient	DHCPDISCOVER on wmaster0 to 255.255.255.255 port 67 interval 2
24/03/08 13:12:59	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation. 
24/03/08 13:13:00	naught101-laptop	NetworkManager	<info>  Activation (wlan0): waiting for device to cancel activation.