linksys router behind gateway not working

[Ernie Luzar]

Hello list;

I am running 11.0 on my gateway system. It has a small LAN behind it. 
This gateway host has ipfilter firewall and a dhcp server. The LAN is 
cabled from the host to a switch and from the switch to each PC on the 
LAN. I added a cable from the switch to a linksys wifi router. I can get 
wifi and cable connection to the router but no connection to the public 
internet through the LAN. The dhcp server lease file shoes a lease for 
the router. I can see this ip address in the router's internal 
configuration.

Is the problem because the router NATs it's issued ip address and then 
the host gateway system NAT's it again?

Thanks for any light you can shed on this