I have a dial up t-mobile connection , and I have a usb flash and I made the usb flash as a router point but I don't know what to do , and also I have my xbox 360 linked up to my laptop but it says local only and doesn't connect to the internet , how do I make this all work ? Please help me , would be most appreciated

The minimum connection specs for Xbox live is a broadband connection of at least 1 meg.
It won't work with normal dial up.