wireless connection problem

Ok ive been able to get my wusb54G version 1 working flawlessly. it would come on during boot and everything. ive even made a guide for doing so which ive posted here before. but now im trying to get it working with WEP. i know the key since i set it up. ive done pretty much everything set up essid and the mode managed stuff and i entered the key like so "iwconfig wlan0 key XXXXXXXXXX" after that i fired up the dhcp stuff "dhclient wlan0" and the output is

site0: unknown hardware address type 776
site0: unknown hardware address type 776
listening on LPF/wlan0/00:0c:41:dc:e7:36
sending on LPF/wlan0/00:0c:41:dc:e7:36
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4
receive_packet failed on wlan0: Network is down

it continues on with different intervals on the same port until it finaly says

No DHCPOffers received.
No Working leases in persistent database.

i dont know why it says network is down. it is up and i can scan my router with iwlist wlan0 scan. does anyone know why the hell i cant connect to my router?