Wireless Access Point, Secured but No Internet

Hello all. So I live in a 2-story home and the WiFi doesn't get a great signal upstairs. So I bought a wireless router to use as an access point upstairs. Here is the router model: http://www.tp-link.com/us/products/details/TL-WR841N.html. I read multiple articles on how to set this up and I believe I followed all the correct steps:

1) I used the command prompt to check my IP address, which was 192.168.1.1
2) I went to the router's web interface and changed it's IP in the LAN settings to 192.168.1.2 (no other device uses this address).
3) I disabled the router's DHCP server function.
4) I wanted both devices to have the same network so I changed the SSID and password on my router to be the same as my main modem/router.
5) I connected the router to my modem using a LAN port on each.

When I rebooted the router and check my laptop to see if it worked, the signal goes to 4 bars (max) from 1-2 bars. However, the status on the Windows sidebar says "Secured, no Internet" and I have no access to internet. The same situation occurs on my Iphone as well (connected to WiFi but reads "No Internet Connection"). When I turn the router off, the Internet comes back, but with the poorer signal.

I tried playing around with the channels of both the modem and router but that didn't help. I couldn't find posts of people with the same issue so hopefully someone can help me out. PLEASE.

My ISP is Frontier (Verizon FiOS) if that is needed at all. Thanks for any help.

NotSoSavvy Notebook Enthusiast

alexhawker Spent Gladiator