XrainMT

I have not modded anything. First I make a ship and everything works fine until I get to the point where I try to make an orbit. When I do this the entire ship locks down I can't tilt it or boost or go into different stages. All I can do is wait for it to crash to the earth/kerbin. This makes the game unplayable. I am looking for way to fix this. I am it on steam and have tried reinstalling it. If you know how to fix it then please tell me.