about AP 00:00:00:00:00 in EAP-SIM

[why]

Hi,all. I want to test the eap-sim. I use hostap-0.7.3 and wpa_supplicant-0.6.10. I find that:
1.The link between the AP and STA is not stable. Sometimes the STA can send IMSI message to the AP and hlr_auc_gw can get it, but most of the time the STA always wants to connnet a AP whose mac address is 00:00:00:00:00:00, like this: Associated with 00:00:00:00:00:00. Where is the problem?
2.I use Odyssey client and hoatap-0.7.3 to test eap-sim. When hlr_auc_gw gets the IMSI message, it says: Received: SIM-REQ-AUTH 460021505910060 3
Send: SIM-RESP-AUTH 460021505910060 8ffd3e3f7dd1b000:778a7e3d:ffffffffffffffffffffffffffffffff 8ffd3e3f7dd1b000:778a7e3d:ffffffffffffffffffffffffffffffff 8ffd3e3f7dd1b000:778a7e3d:ffffffffffffffffffffffffffffffff
But it stops here, and the client says "connect fail".Where is the problem?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.shmoo.com/pipermail/hostap/attachments/20111029/c75d909f/attachment.htm