wifi connect not

[mac]

I'm finally getting back to looking at the wifi on my dell xps1530 w/
Intel 3945. I have Unbuntu Studio Hardy amd64 installed.

Here is the result after bringinh down eth0 and wlan0 up:

lsmod | grep 3945
iwl3945               100848  0 
iwlwifi_mac80211      253284  1 iwl3945


lspci |grep Network
0b:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG
Network Connection (rev 02)


iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11g  ESSID:"macwap"  Nickname:""
          Mode:Managed  Frequency:2.437 GHz  Access Point:
00:0C:41:68:E7:99   
          Tx-Power=27 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2346 B   
          Encryption key:xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xx
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

dmesg | grep 3945
[   88.757156] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network
Connection driver for Linux, 1.2.0
[   88.757160] iwl3945: Copyright(c) 2003-2007 Intel Corporation
[   88.757810] iwl3945: Detected Intel PRO/Wireless 3945ABG Network
Connection
[   89.719885] iwl3945: Tunable channels: 11 802.11bg, 13 802.11a
channels
[   89.724457] wmaster0: Selected rate control algorithm 'iwl-3945-rs'

But I don't get connected.

Any pointers appreciated.