Unable To Browse VPN

I have set-up a vpn connection for remote users to the office router. It's a 3Com 3cr860-95 router. I am able to connect to the router and ping the network. Log files on the router show a successful logon and logout. My connection type is PPTP. The router assigns a local address (192.168.1.x)from the pool of reserved addresses for VPN. The problem is I can't browse the network. Network shares and computers are not visible.

Any ideas?

Thanks.