Nortel phone 2210 not working with Cisco AP 1231

Hello!

I've got problem with connecting Nortel 2210 Handset to Cisco Aironet 1231 AP.
I have configured handset with static ip address, subnet mask and default gateway. In AP logs i see this:
Jan 4 15:09:06.730: %DOT11-6-ASSOC: Interface Dot11Radio0,
Station 0090.7a04.490e Associated KEY_MGMT[NONE]
Jan 4 15:09:27.134: %DOT11-4-MAXRETRIES: Packet to client
0090.7a04.490e reached max retries, remove the client
Jan 4 15:09:27.134: %DOT11-6-DISASSOC: Interface
Dot11Radio0, Deauthenticating Station 0090.7a04.490e Reason: Previous authentication no longer valid
And on handset screen i see: Initializing -> No GW Response.
What could be the problem? PC and IPhone connected to the same AP works fine!

Thank you very much in advance!