Help with 2.8

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Hi everyone, this is my first post here.
I am from argentina, sorry for my english.
I made a quadcopter with an AIO HK flight controller board.

(http://www.hobbyking.com/hobbyking/store/_69986__Multiwii_and_Megapirate_AIO_Flight_Controller_w_FTDI_ATmega_2560_V2_0_RU_Warehouse.html)

I have loaded the 2.8R3 mpng, I was try to use V3 but dont work the compass.
I use mission planner 1.3.34.
My quad works very well, but I never could calibrate the accel and compass.
When i go to “INITIAL SETUP”/“Accel Calibration” and press the buton “Calibrate Accel” the buton switch to “Click when done” and below appears “command received” and nothing else happens.
With the compass, when I go to “INITIAL SETUP”/“Compass” automatically and error window appears.

I hope you can help me and already thank you very much to all.