Linksys Wireless Router :: 2 E4200s On Same Network Connected Via Cable?

I used to have this exact setup with 2 wrt610ns i believe was the model number, i have one at my house, connected to my dsl, and then another in my "man cave" connected by a approximately 250 foot buried outdoor cat6 cable, inside of conduit of course. Last week both routers along with my modem were fried during a storm, so now i rebuilt the network with 2 e4200s, i hooked everything up and b4 i even had a chance to set my network up like i had to do b4 (a 192.168.10.1 subnet in the mancave) everything was already getting internet, however i cannot access the web based setup for the 2nd router (mancave) the dhcp client table shows it with an address of 192.168.1.139. even if i disconnect, reset the 2nd router and set it up on a 192.168.10.1 address as soon as i connect it to the main router, it goes right back to the .1.139 ip address. the only problem i have with this is that i would like to have the freedom to change my wifi passwords or edit other settings on my network without having to disconnect from the main router everytime, assuming that will work and i wont have to do a hard reset in order to get the router back to a default ip. the cable connecting the 2 routers goes from a lan port on the 1st router to the internet port on the 2nd.