As others have suggested, multiple routers on the same LAN can be a bit problematic and result in various scenarios like Double NAT if you are cascading them and connecting the first router (upstream router, connected to your ISP) to the second router (downstream router).
You'll want to turn off DHCP on the second (downstream router) and let the first (upstream router) handled everything from DHCP to Gateway functions. To do this you'll need to configure that downstream device's LAN settings so that they fit the addressing scheme of the upstream device.
I like my first / primary (upstream) router to be something like 192.168.1.1 and I usually set the DHCP Scope to be something like 192.168.1.100 to 192.168.1.199 (few homes or small business will require more than a hundred addresses).
Then I set my second (downstream) router to be something like 192.168.1.254 and turn DHCP off. Then I connect the two Switch Port to Switch Port.
Here is a decent article that sort of explains what I just said although the numbers are different, it may help you better understand what you need to do.
http://www.labnol.org/software/add-router-to-wireless-network/19716/
Good luck and keep us posted.