In order for the Garmin to process any traffic information, it must be moving at 25-30 kts. or greater. Standing on the ground will not allow the Garmin to show traffic.

In addition, you must be zoomed in to an 8 mile or closer zoom range for traffic to be displayed on the moving map. This makes sense since the traffic detection range on the XRX is 6 NM. Zooming out any further will only clutter the traffic close to the center. There is also a limiting setting in the menu setup that will determine how close traffic has to be to be considered, but unless you have changed this, the default setting is fine.

Please note that these filters only apply to traffic displayed on the moving map. Any threatening traffic will generate a pop-up, regardless of what screen you are looking at.