VOIP Vlan bridging over multisite

[Eleander]

I tried following the configs on this forum to bridge a VoIP vlan over different sites. ( all are pfsense boxes running the latest version)
But whatever I try I can´t get the selectbox to enable the Bridged interface!

Got a VLAN on a pfsense.
On that same Pfsense got a server Openvpn, you have to set it up in TAP mode for the possible bridging.
Then created an interface on that ovpn, brdged the ovpn zith the vlan, but still can`t select the interface within the bridge?
Any things I should check?