Unfortunately I live in an area with no DSL/Cable

If you're using ICS the computer needs to have an ip of 192.168.1.1. Change the IP of the router to 192.168.1.2. You then need to tell the router that it's gateway is 192.168.1.1 and strictly speaking it should be set into "bridge" mode. It's a lot of hassle and slow and it's easier to get a Solwise 3g router which costs about £60. It will then maintain the internet connection and all the traffic flows in the right direction.