maxdor

Hello everbody, I've got some problem with Mechjeb include Real Solar System and Kopernicus. Mechjeb do very confused things, if I install the Real Solar System. It shake the ship from one side to the other again and again after take-off. The Landing Autopilot only start the engines one single time, turn it off, and the ship falls to the ground on Kerbin. I've got enough fuel and thrust. Where is the problem? Could someone help me? Kind regards, maxdor!