Simucube 2 Pro Wont work

The light goes green and then blue but the servo motor wont start…it has the message waiting. The status information shows “Waiting for servo drive to start. Release e-stop if it is pressed” , . After a week I tried starting it with the PC turned off and it started and when PC started it worked in iRacing. But that was it, next time, wouldnt work and turning PC off and starting didnt work.