Multiple Vlan's through BGP based VPLS

Hi this is the first time i post here.

My setup is like this :
i) I have a pptp-server running on a RB1200 and a pptp client on RB751u
ii) There’s is a pptp tunnel between them and through that tunnel i have a BGP based VPLS tunnel

The setup is working fine.

Now i want to route multiple VLAN’s through that tunnels.

Any suggestions how to proceed with the implementation?

Thanks