Problem with my thinkpad w500 wireless on Ubuntu 11.04

[kieubang]

Hi,
I am having wireless problem on my thinkpad W500. I can see wireless but I am unable to connect.
My Thinkpad W500 wireless version is: Intel Wireless WiFi 5100AGN, 5300AGN, and 5350AGN
Could you please help me resolve the problem.
Thanks

[kieubang]

lshw -C network
WARNING: you should run this program as super-user.
*-network
description: Ethernet interface
product: 82567LF Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 03
serial: 00:27:13:65:80:93
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.2.20-k2 duplex=full firmware=1.8-3 ip=192.168.1.3 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:45 memory:fc200000-fc21ffff memory:fc224000-fc224fff ioport:1800(size=32)
*-network
description: Wireless interface
product: Ultimate N WiFi Link 5300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 00
serial: 00:21:6a:92:60:a0
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-10-generic firmware=8.83.5.1 build 33692 latency=0 multicast=yes wireless=IEEE 802.11abgn
resources: irq:47 memory:f4200000-f4201fff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.