Leopard VPN & SonicWall Question

Howdy, I have installed Leopard Sever "standard" configuration on a MacPro using a SonicWall firewall (TZ180). I am using the built in VPN server on Leopard Server. I have created the necessary "rules" on the SonicWall and I am able to mount sharepoints on the server. I can also route all traffic through the server without issue. I cannot however reach any LAN addresses on the connection other than the server (192.168.1.231). If I ping an LAN address on the VPN it cannot reach the it, only the Server. I need to network a Filemaker server on the LAN found at address 192.168.1.230. The FM Server at 192.168.1.203 is sharing the same gateway ( Sonicwall 192.168.1.1) as is the Leopard Sever. The tech at SonicWall tells me that this is not a SonicWall issue. Any ideas how this issue can be resolved? Kind thanks