No Data Received Mav_Cal_Progress and Mav_Cal_Report while Doing Compass Calibration

Hi,
I am developing a Custom Ground Control Station using Java Mavlink Library.

I have written code for Compass Calibration, i m sending the Request for drone and i do get a Response Compass Calibration Running in messages also when Compass Calibration is done, i get Compass Calibration requires Reboot.

Even in Console i dont get any Mavlink Messgae nor Instanceof MavCalReport and MavCalProgress .

Can anyone have idea how it is implemented .Please Help.