I need help with my macbook or my bt homehub. Dont know which one it is cause i dont know much about mac's are networking.:?:

My homehub is connected to my pc which works fine but when i try to connect my macbook by wireless it doesnt even pick up the signal its given off. Its picking other ones up who live around me but not the one that is right beside it. :grumble:

I know it works ive had it working before but i most have changed something and cant remember what so can anyone help me :) :) :)