Hi,
It's my first post so I hope I won't forget important details
I try to configure a WorkGroupBridge AP (Cisco 1240) with a LW-AP connected to a WL Controller 4400.
My situation looks like to this one : http://www.cisco.com/en/US/products/ps6366/products_configuration_example09186a0080905cea.shtml
The only thing I have to modify is the authentication encryption.

Below, the WLAN parameters.
Unfortunately and despite of many docs I've found on Cisco website, I don't understand the authentication error I have between WGB and AP.
A debugging on WLC give an infinite result of this error :
*Dec 13 13:24:08.798: 58:8d:09:8e:28:dc Scheduling deletion of Mobile Station: (callerId: 24) in 5 seconds
*Dec 13 13:24:08.851: 58:8d:09:8e:28:dc Scheduling deletion of Mobile Station: (callerId: 24) in 5 seconds
[...]
On the controller, the AP State is on "Probing" status.

On the WGB I just have this error :

%DOT11-4-CANT_ASSOC: Interface Dot11Radio0, cannot associate: WPAIE Invalid unicast suite count: 2
Can you help me to resolve this problem?
So, this is the conf I have configured :
____________________________________________________________________________________________________
version 12.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ap
!
enable secret 5 <Password>
!
clock timezone GMT+1 1
ip subnet-zero
!
!
no aaa new-model
!
dot11 ssid <Wifi SSID>
authentication open eap eap_methods
authentication network-eap eap_methods
authentication key-management wpa
authentication client username <username> password 7 <encrypted password>
infrastructure-ssid
!
dot11 network-map
power inline negotiation prestandard source
!
!
username Cisco password 7 <Encrypted Password>
username cat-tacacs privilege 15 password 7 <Encrypted Password>
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption mode ciphers tkip
!
ssid <Wifi SSID>
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role workgroup-bridge
rts threshold 2312
mobile station period 20 threshold 70
beacon period 50
infrastructure-client
bridge-group 1
!
interface Dot11Radio1
no ip address
no ip route-cache
shutdown
no dfs band block
speed basic-6.0 9.0 basic-12.0 18.0 basic-24.0 36.0 48.0 54.0
channel dfs
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface FastEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
bridge-group 1
bridge-group 1 spanning-disabled
!
interface BVI1
ip address dhcp
no ip route-cache
!
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
ip radius source-interface BVI1
!
!
control-plane
!
bridge 1 route ip
!
!