My little bro got a 360 yesterday and I went round to help him set it up. I plugged in the wifi adapter though and nothing happened...!!! it says in the instructions that you just need to plug it in and the 360 will recognise it and guide you through set-up... when I plug it in it has a blinking yellow light but nothing else happens. I don't remember it being this difficult when I had my 360 - anyone know what I'm doing wrong????