My internet connection works just fine when it's manually connected via a cable to my modem, but when I tried enabling my wi-fi connection, it doesn't seem to work. I have 4 LAN ports in my modem and I connected the first one with my laptop and the second with my router. Now my laptop picks up my internet connection, and my wireless signal but the wireless wont connect. I tried unplugging the cable from my modem to my laptop and tried enabling my wifi, but that doesnt work either.
Since your "modem" has 4 LAN ports, it's also a router. You don't want two routers in the same LAN if you can avoid it, and you can. So just use the wireless router as an access point or bridge.
You can now use the router's WiFi and available LAN ports to connect devices to your network.