Are you using different cable connections? 1.1.7 needs tilt to tilt, 1.2.0 needs tilt to tilt, roll to pan. You're now confusing me... LOL.
Can you be more specific as to what isn't working?
I'd suggest just sticking to 1.1.7 till they release step by step instructions, this is beta, and may not suit you.
i am on 1.1.7 because i dont have a connector that fits the servo leads together ( roll to pan ).
in 1.1.7 i get the tilt servo to stop turning but the roll isnt stopping tried most of the diffrent numbers.