GARMIN C330 STREETPILOT [Garmin Quest GPS System - 114281]

I have recently bought a GARMIN C330, and after installing the maps on the computer and then onto the gps. When i try to use it it shows no roads near start point, however i am on a road and it does show on the GPS system, i also have a 1GB card in there and there is plenty of memory left. Do i need to setup waypoints and routes first inorder for it to recognise it??? please help'" please help as i am at a loss where to go next.