Me Documented!

Last time, I was working on an open wireless network. In case of WEP encryption, just add the following commands to above the lnxreq_autojoin line which you can find here

wlanctl-ng wlan0 dot11req_mibset mibattribute=dot11WEPDefaultKeyID=0
wlanctl-ng wlan0 dot11req_mibset mibattribute=dot11ExcludeUnencrypted=true
wlanctl-ng wlan0 dot11req_mibset mibattribute=dot11PrivacyInvoked=true
wlanctl-ng wlan0 dot11req_mibset mibattribute=dot11WEPDefaultKey0=xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx

Replace the "xx:xx:..." with your WEP key. In case of 128 bit, it will be 13 hexaedcimal values.
<!-- break -->