Help with WPA & WPA2 PSK (AR5211 x AR5213)

Hi …

Is there any special reason for an OEM AR5211 based card on a 3.27 ROS working as station on 2.4b mode not connect to a 3.27 ROS that have an AR5213 (UBNT SR2) when running WPA / WPA2?

Using default security profile they connect.

The station with ROS 3.27 + OEM AR5211 connects ok using WPA or WPA2 if the AP is not MT with AR5213. Works with a Netgear AP, Level One AP and MT 3.27 + OEM AR5211 AP.

On the other side, ROS 3.27 with SR2 as AP accepts B mode clients with WPA or WPA2 enabled (several chipsets, including one with AR5211 from an old Linksys A/B PCMCIA adapter).

Any ideas?

Regards;