multihome routing help

[Tom Farrell]

BSD 5.0 3 Nic cards.

Card 1 connects to DSL network and assigned route able IP from the  
             ISP

Card 2 connects to a private frame-relay network  and is assigned 
            192.168.66.2/22 directly connected interface is 192.168.66.1/22

Card 3 connects lan is assigned 192.168.67.0/24

I have enabled Nat & ipfw on card1 and clients on Lan can use the DSL connection perfectly.
    
I can source traceroute the directly connected 192.168.66.1 sourcing 192.168.66.2 interface.  I cannot source traceroute  to 192.168.66.1 when sourcing from 192.168.67.1.

Based on this it does not appear that forwarding is happening between the two networks, 192.168.66.0/24  & 192.168.67.0/24 ? Seems the only reason that the traffic is passing through is because of the Natd & ipfw divert statments... 

Can this be done with routing or do I have to use ipfw to forward between both networks? I would prefer just to run the nat & ipfw instance on the DSL interface and run pure routing between the lan interface & the interface which connects to the frame-relay network..

thnx in advance