Evohome problems

I've recently had an Honeywell Evohome system (half) fitted by a plumber.. But I am struggling to get it working correctly. I have HR92's set up in several rooms and I have set these up as zones on the central controller. Unfortunately they ALL come on when the living room radiator comes on, (incidentally this is the room where the main controller is kept, not sure if that makes any difference).
I have also tried turning the dials on the individual HR92's when they are off and I hear the motor turn , but no heat appears in the radiator.
Please help