We just bought a 2011 Town and Country Limited with the 430N navigation package. It was working like a champ until yesterday when we suddenly couldn't search any addresses or get any local street data. The error we got was 'no map data available' and it's right there is absolutely right - there is no map data at all. Any thoughts?

 

Is the map data for this system on a CD and if so, are you sure the CD in the unit?