Is it asking you to enter the city first? The city always goes in first, once mine recognizes the city I simply push the street button, then the house number (which is often given after input as a range....say 0-100 Capitol Street). If the City is pre-loaded at the top because you have already accepted a navigation direction there, you should be able to just hit street and have the opportunity to navigate to a new street in that City.
Good luck.
Good luck.