no dhcpoffers received with configuring wlan

[ron]

Hi,

Can anybody help with my wlan configuration? without encryption it gets an ip from dhcp and i can get on the internet.

But when i use encryption WEP, i can't get a connection with my network.

with: sudo dhclient wlan0 it shows:

dhcpdiscover on wlan0 to 255.255.255.255 port 67 interval 8
etc 7
ect 10
etc 11 till 15
No dhcpoffers received.
no working leases in persistent database