How do you make the plane automatically fly on the Flight Plan? I can see the route on the GPS but I can't make it fly on the route automatically! If you can help, could you explain your steps carefully?

Look on the panel for a switch labelled NAV/GPS. Place the NAV/GPS switch to the GPS. On the autopilot panel, turn on the A/P, select the NAV button/switch (illuminated), this should cause the aircraft to turn toward the GPS line.When you get near your destination, make sure the heading bug is centered over the bearing you are flying. If you are on an ILS plan, ATC will vector you to the appropiate runway. When they tell you to turn, select HDG on the autopilot, adjust the heading as vectored. Place the NAV/GPS switch to NAV. You are now setup to insert the correct runway NAV frequency into the NAV1 radio for your approach to landing.