compass calibrate

My compass was working fine but when I changed landing gear because one was cracked (I didn't change the compass i kept the same one) the compass now needs calibration but every time I try to calibrate it , it says failed to strong interference detected. There is no metal or gadgets near the...

I have the P3P. All my firmware is updates. I have 3 batteries, which I labeled so I can keep them in order of use. One of batteries when placed in the Phantom, I keep getting a message that I need to calibrate the compass. When I complete this, i get ready to fly and I get the error again...