I am attempting to trade with my neighbors, but my harvesters/cargo ships won't go into the circles surrounding the other player's planet so that I can then put it in orbit and then establish a trade route. I tell them to move near the lpanet, but isntead they just sit there just outside the red/orange circle surrounding another player's planet. Can someone clarify the steps requierd to establish trade route and if so tell me what I am doing wrong.