WEP connection problem

Hello, My Lubuntu installation has been able to connect to a network secured with WPA2 and to another with WEP. My TDE installation, from the recent Exegnu live CD, can connect to the same WPA2 network but not to the WEP one - the authentication fails. Right now the WEP network is the only one available to me, and I hope to be able to use it to upgrade TDE. Does the following info suggest anything? $ sudo lspci -vv | grep Wireless 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83) Subsystem: Intel Corporation Dual Band Wireless-AC 7260 $ lsmod | grep iwl iwlmvm 189813 0 mac80211 630653 1 iwlmvm iwlwifi 169932 1 iwlmvm cfg80211 484040 3 iwlwifi,mac80211,iwlmvm <part of /var/log/syslog> Dec 18 20:04:52 r dhclient: Internet Systems Consortium DHCP Client 4.3.1 Dec 18 20:04:52 r dhclient: Copyright 2004-2014 Internet Systems Consortium. Dec 18 20:04:52 r dhclient: All rights reserved. Dec 18 20:04:52 r dhclient: For info, please visit https://www.isc.org/software/dhcp/ Dec 18 20:05:35 r dhclient: Dec 18 20:05:35 r dhclient: Listening on LPF/wlan0/7c:7a:91:60:c0:07 Dec 18 20:05:35 r dhclient: Sending on LPF/wlan0/7c:7a:91:60:c0:07 Dec 18 20:05:35 r dhclient: Sending on Socket/fallback Dec 18 20:05:35 r dhclient: DHCPRELEASE on wlan0 to 10.2.96.1 port 67 Dec 18 20:05:35 r dhclient: send_packet: Network is unreachable Dec 18 20:05:35 r dhclient: send_packet: please consult README file regarding broadcast address. Dec 18 20:05:35 r dhclient: dhclient.c:2331: Failed to send 300 byte long packet over fallback interface. Dec 18 20:05:35 r kernel: [ 253.450550] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S Dec 18 20:05:35 r kernel: [ 253.451214] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S Dec 18 20:05:35 r kernel: [ 253.474679] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready - Robert