The configuration is right my friend i'm pretty sure, it very basic(wep/securebeacon) nothing else.
I can get all stuff working disabling the firewal on RFS6000/7000.
Once I enable it all client 6846/VRC6946 goes down on roaming, except my Intermet CV30/MC9090/IND FTF/Voice T2x/T5/T2....
But for example if i have the firewall up, and configure all AP300 and without the Suported radio 6,9,36etc... and keep the basic 1,2,5.5,11 i works fine....