Troubleshooting arming of apm2.6

i purchased apm v2.6, few weeks ago. i’m building hex-copter and i could successfully calibrate all mandatory hardwares and esc’s too. but i’m facing problem in arming the board. when i connect the lipo and power up, i hear continues beeps from motors. this is stopping from arming the board. i do not know what that continues beeps mean. please help me in getting through this problem asap.

thank you

Sounds like the esc calibration did not succeed …
I would try again, and hopefully it will work/