Vlan Radius Server no concurrent connection

Hey Guys,

So starting a new project we put them on a separate VLAN, then made a VLAN interface on our MT so we can dial up to the radius server, This part works, issue is for some reason it only allows 1 concurrent connection (only one user on VLAN 20 can dial up at a time) but our normal VLAN 1(no VLAN) has multiple connections.

Am I missing something really stupid or?

THanks in advance for any help.