Route VPN traffic to another internal subnet

ASG 120 running 8.301
I have a PPTP VPN set up using the pre-configured PPTP IP pool. The users are able to connect and can browse the internal LAN (192.168.6.0).

We have a router in place for a MPLS network that connects 192.168.6.0 to another subnet, 192.168.7.0.

Users who connect via VPN cannot reach 192.168.7.0. Can anyone help me to configure the ASG to allow that traffic.

Thanks