Problem with EAP-FAST in Cisco Aeronet 1200 series AP with internal radius server

Hi,
I have a problem , if internal radius server is enabled in CISCO aironet 1200 ap, the EAP process is not completed .

Below mentiones is the observation in Sniffer.

From AP: server hello, change cipher spec , server hello done
Then client sends : client key , change cipher spec,encrypted handshake message
Then AP send fatal alert and unexpected message.

I am using a old version of supplicant .I don't know the exact version. It was taken some where around 2007 March.

If I configure the AP for EAP-FAST with external radius server , it works fine with the same supplicant code.

If I configure the AP for EAP-FAST with internal radius server, then I am able to connect the AP from my LAPTOP but not from the board which is having old supplicant code.

This ensures the configuration in Cisco Aeronet AP for EAP-FAST is fine.(with both internal radius server and external radius server)

So I think , there is some problem in the WPA supplicant code .

I have compared the new supplicant code with the supplicant code which I am using. I couldn't see any problem and didn't get any clue.

Any one have seen this issue , during their wok.
Please let me know , if you have any information about this.

Thanks and Regards
santosh