Same IP configuration on Client and VPN netoworks

[LaraM]

We are using Linksys BEFSX41 VPN router in the office and SSH Sentinel on the clients. The office IP subnet (NAT)is 192.168.1.1/255.255.255.0. I can connect successfully from most clients and access VPN resources by routing all 192.168.1.1/255.255.255.0 requests to the local client's gateway.

The problem is with one remote office that has the same exact IP configuration as the VPN network - subnet 192.168.1.1/255.255.255.0 The VPN client connects successfully but it's impossible to access anything on the remote network.

What are my options? (besides reconfiguring IP subnets, which is not an option?)

Thanks!!!