Poor roaming performance with MSM710 and 310

[SINFODEX]

Hello  

We have confgured 1 MSM710 controller with 8 MSM310 access points.

At the beginning we configured WPA2 with PSK and found slow roaming performance (6-8 lost pings when roaming beetwen APs)

We tested without protection (uncheck Wireless protection in VSC) but experienced same slow roaming performance

I know there is a Premium Mobility license that enables the Fast wireless roaming, but given that the problem occurs even in non-secure mode, is this license going to solve my problem ?

Last information, we use Wireless MAC Filter on this VSC : can this be the cause ?

Other ideas ?