I didn't get out to space center during re entry. I go to space center while completely still, in a stable, circular orbit! Most of the cases is, I stoped the ship in orbit, went out to the space center, and launched another ship, tried to dock with the first ship, but BOOOM, during "final approach", the first ship blew out. Is there anything to do with the debris? Might be the ship hit some. But about the minor problem, I think it's quite clear enough. Anyway, thanks for your suggestion.