VPN Routing question

I have a current setup with a rb493 with 3.20
I have a IPSEC tunnel to my host site that is working fine.

What I need to do is allow a remote client with windows machine vpn to connect to the rb493 and receive data from the host across the ipsec tunnel.

I have the pptp server setup so that I have a interface that comes active when the client connects. Everything seems to work fine as far as when the client connects, he can surf the internet and check email but cannot get data from across the tunnel.

Is there something that I need to set on the ipsec tunnel to allow this vpn user to travel across it?

Any help or guidance would be greatly appreciated.

thanks
kenny