My Brushed esc getting hot when connected to arducopter board,

But its working smooth with the servo tester and motor run both direction and stops so all fine when tested with servo tester

when esc connected, telemetry module not working, when diconected, the telemetry works again

I am powering the boards with dc adapter, 

The same powersupply with servo tester works without problem

what can be the problem?