MultiWii release 2.1 is here :)

[Donjuanzx9]

I found this but I dont understand how to start it,
The ACC values are stuck to +/-400
This is one of the most common issue with ACC.
The accelerometers need to be calibrated at least once via the RC sticks combination (low throttle + pitch stick low + yaw full left).
Once this step is done, the accelerometer neutral value is stored in the EEPROM.
Without this step, the accelerometer values won’t correspond to anything, and sometimes there are anarchical bars in the GUI.
The values are typically 0/0/200 or 0/0/250 or 0/0/512 after a good calibration, depending on the ACC type.

[Donjuanzx9]

I did this and it goes to zero and then right back where it was.
Accelerometers calibration
This step is relevant only if you have a Nunchuk or an individual ACC.
The multicopter inclination should be as horizontal as possible during this step.
To calibrate the neutral of accelerometer sensors, you must tilt the yaw stick left, tilt the pitch stick back while having the throttle stick in maximal position.
This step must be realized at least once, the acc calibration is then stored in the EEPROM.
This step can also be realized directly from the GUI via the CALIBRATE button.
Note this step is very important and is one of the most common issue we can see in feedbacks, please don’t skip it.
If this step is not correctly done, the status LED will blink forever and you won’t be able to arm the motors (security).
The status LED will blink to confirm this step.

[Donjuanzx9]

I think I answered my own question in my post?
I think its supposed to be 250 can anyone confirm?