Transportation Cockpit Map Function

Hi Gurus

I have been using TM 8.0 and in the transportation cockpit when i select FUs and open map ( from the menu "show map") it opens the map but only shows locations and resources. Normally it should show the FUs with arrows between locations.( I would be able to make the planning within the map screen by right clicking of arrows) Do you know the reason why the system doesn't show the arrows ( FUs) ? Pls consider that in the profile of the map screen all the objects are activated.