I'm using three routers, one that's wireless and two that aren't. I'm using a computer in a different room with a cable cord that the other router is using. I can't get internet in my room, but the computer that was there first still has internet, with the same cable, just a different router. How can I make it so I can go online in my room, but others can still use the computer in the other room? And please, don't suggest if you have to buy something. Me and my family's a little tight on money currently.