I am not that familiar with that unit either, but under your main menu, do you have something there called database, if so, click on it, your downloaded map might be showing there. that is the way it is on my Magellan sportrak. also just wanted to let you know i sent an email to garmin on this subject, will let you know what they say as soon as i get a reply. couple more things, i think that unit can be set for land or water? you might try changing that around. also, need to know what version of software your unit has in it. oh, zoom in further on the map also, sometimes at certain levels it skips some map detail.