Hello everybody.
Please forgive my poor Englich.
So i have a Thinkpad T40 with Ubuntu Hoary. It's wonderful.
Ubuntu is for me one of the best distribution and i want to keep it installed.
I had the problem that my wlan only without encryption work "even without wep"
I've tryed this how-to. and i become this.

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jhioui@Thinkpad:~$ sudo dmesg | grep ipw
ipw2100: Intel(R) PRO/Wireless 2100 Network Driver, 1.1.0
ipw2100: Copyright(c) 2003-2004 Intel Corporation
ipw2100: Detected Intel PRO/Wireless 2100 Network Connection
jhioui@Thinkpad:~$ sudo wpa_supplicant -B -i eth0 -c /etc/wpa_supplicant.conf -D ipw -w -dd
Initializing interface 'eth0' conf '/etc/wpa_supplicant.conf' driver 'ipw'
Configuration file '/etc/wpa_supplicant.conf' -> '/etc/wpa_supplicant.conf'
Reading configuration file '/etc/wpa_supplicant.conf'
Line: 3 - start of a new network block
ssid - hexdump_ascii(len=12):
53 6f 75 66 69 61 6e 65 57 4c 61 6e meinssid
proto: 0x1
scan_ssid=1 (0x1)
key_mgmt: 0x2
PSK (ASCII passphrase) - hexdump_ascii(len=13): [REMOVED]
PSK (from passphrase) - hexdump(len=32): [REMOVED]
Priority group 0
id=0 ssid='meinssid'
Daemonize..
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but i still have no connection to my router. or i become no ip from my dhcp.
I dont know what to do. What did i wrong??
Please help me solve this. I don't want to use my wlan without encryption.
Thank you All!!