How do you use the MechJeb Autopilot feature?

[bigguy4u]

I have the latest version of mechjeb with KSP 1.1.2 so all my mods and stuff are up to date. My problem is that when I try to use the autopilot in mechjeb, it does NOT want to cooperate. It turns to, let's say, north, then south, then north again until it breaks apart from the aerodynamics (I have FAR if that helps). I already correctly entered the numbers, my target orbit, AoA is at 2 degrees, I edited my ascent profile and everything, but the thing just doesn't want to work! I have NO idea what is going wrong. I know it isn't a problem with my rocket because I was able to fly it to orbit just fine by myself, but mechjeb just wants to throw it all over the place. This is my first time trying to use it and it's frustrating because I already tried looking up tutorials for it but they're all very outdated or not a good explanation. I just want to know why it won't perform a gravity turn smoothly without jumping everywhere. If anybody could help me, I would be very grateful.

Edited May 22, 2016 by bigguy4u

[sebi.zzr]

If you're using MJ and FAR,you need additional extension.dll for FAR.Just put MechJebFARExt.dll in KSP_win\GameData\MechJeb2\Plugins,next to MechJeb2.dll.
And here is my ascent AP setup:

 

[sarbian]

No. This is not needed anymore.

 

Get the last dev version of MJ. I fixed a problem with the controls.