What boat are you trying to track? Are you looking in the Boat Mapper section? If so, you should be able to select your boat's name from the list in the My Boats section. Then once your boat is added to My Boats, you can also click on the new link that has been added to your list, and the mapper will center on your boat and popup the positional info.
If that doesn't make sense or all you see is Please Wait in the My Boats box, please ask again.