Your problem is there is an domain address conflict(3rd ip octet) between the clients local network and the vpn network.
It actually sounds like a security problem. Check your access lists, and make sure the addresses given out by your VPN are allowed access to those resources.
Split tunneling is not enabled. This would permit access to local resources while attached to the VPN network. This is a typical security precaution. This prevents the VPN client from being a pass-through gateway between the client network and the connected VPN network.