Alright, so after having tried everything in my power I cannot figure out how/why my mechjeb broke so I made a forum account specifically to hope you guys can help me out. Mechjeb has always worked fine up until somewhere in the midst of 0.23 it broke for me. And now in 0.235 it’s still broken for me. Let me tell you what I tried before we proceed further with my problem.

• reinstalling Kerbal Space program.
• reinstalling Mechjeb
• Reinstalling kerbalspace program fresh on a different location on my hard drive with a fresh copy of mechjeb, I only edited the config file to allow mechjeb to be used at start together (By editing tech required to = start) with the auto-launch functionally (Using the same editing config tech technique) so I could see if the problem was still there.
  It was.

The reason I installed it on a fresh bit of my hard drive was to see if I somehow managed to tweak some setting in some deep hidden config I never knew about, and to prevent this issue I installed it somewhere fresh.

Now, my problem is relatively simple.
I build a ship, add the mechjeb to it. Set it to auto launch, auto stage, and I don’t even check the box to prevent it from going faster than is optimal for its height to test this out. Then basically press the go button. Now, the ship launches. So the boosters kick in and the ship takes off, then the boosters run out. Mechjeb stages automatically perfectly. So far everything is smooth sailing. Then after the booster has decoupled.

It stops, it simply doesn’t up my throttle. My ship thus loses speed and quickly plummet’s back down onto kerbin. And I can’t figure out why. Tell me what logs you need or what screenshots you need and I’ll provide them cause I’m at the end of my rope here.

Here is a zip of the KSP_DATA/outputlog.txt
It's of a single flight, a simple vassal using 1 small tank and 1 engine.
The launch you will see in the log is by hand, basically I loaded up the ship with a mechjeb module activated the auto_launch and pressed space, nothing happend. So i launched the ship myself.

Interesting fact is that when going 300m/s at 2km mechjeb did not tick on the optimal speed (Normally it becomes green when mechjeb detects you go to fast and corrects for this)

The link: http://ge.tt/6tW2AQY1/v/0?c

Like i sayed it might be related to issue #337

My issue seems to be very much alike thisone:
#337

So consider thisone closed by myself and referring other people to this thread.

Put a zip of the KSP_DATA/outputlog.txt somewhere I can get it and we'll see if I can find out the mistery