my notebook is thinkpad t400,
intel wifi link 5100，
linux kernel 2.6.27，
system fedora 9 ,
I've install as many drivers as I can and the wlan0 LED can be lighted up,but cannot work properly.
I've spent a lot of time on these problems,please guide me how to solve them?
＃ifup wlan0
Error for wireless request 'Set Mode' (8B06) :
SET failed on device wlan0 ; Invalid argument.
Error for wireless request 'Set Encode' (8B2A) :
SET failed on device wlan0 ; Invalid argument.
determining wlan0 IP ..
＃iwconfig wlan0
wlan0 IEEE 802.11abgn ESSID:'TP-LINK'
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Tx-Power=15 dBm
Retry min limit:7 RTS thrff Fragment thr=2352 B
Encryption keyff
Power Managementff
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
＃lshw -C network
*-network
description: Ethernet interface
product: 82567LM Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 03
serial: 00:1c:25:96:33:6f
size: 100MB/s
capacity: 1GB/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=0.3.3.3-k6 duplex=full firmware=1.8-3 ip=192.168.1.102 latency=0 link=yes module=e1000e multicast=yes port=twisted pair speed=100MB/s
*-network
description: Wireless interface
product: Intel Corporation
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wmaster0
version: 00
serial: 00:21:5d:46:52:2c
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list logical ethernet physical wireless
configuration: broadcast=yes driver=iwlagn latency=0 module=iwlagn multicast=yes wireless=IEEE 802.11abgn
*-network DISABLED
description: Ethernet interface
physical id: 2
logical name: pan0
serial: 92:7c:9e:d6:8e:7d
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes
＃dmesg
iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27kds
iwlagn: Copyright(c) 2003-2008 Intel Corporation
iwlagn 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
iwlagn 0000:03:00.0: setting latency timer to 64
iwlagn: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
iwlagn: Tunable channels: 13 802.11bg, 24 802.11a channels
iwlagn 0000:03:00.0: PCI INT A disabled
phy0: Selected rate control algorithm 'iwl-agn-rs'
HDA Intel 0000:00:1b.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
HDA Intel 0000:00:1b.0: setting latency timer to 64
........
iwlagn 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
iwlagn 0000:03:00.0: restoring config space at offset 0x1 (was 0x100102, writing 0x100106)
firmware: requesting iwlwifi-5000-1.ucode
Registered led device: iwl-phy0:radio
Registered led device: iwl-phy0:assoc
Registered led device: iwl-phy0:RX
Registered led device: iwl-phy0:TX
ADDRCONF(NETDEV_UP): wlan0: link is not ready
.............
iwlagn 0000:03:00.0: PCI INT A disabled
iwlagn 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
iwlagn 0000:03:00.0: restoring config space at offset 0x1 (was 0x100102, writing 0x100106)
iwlagn: Error sending REPLY_ADD_STA: time out after 500ms.
Registered led device: iwl-phy0:radio
Registered led device: iwl-phy0:assoc
Registered led device: iwl-phy0:RX
Registered led device: iwl-phy0:TX
ADDRCONF(NETDEV_UP): wlan0: link is not ready