Radar disconnected warning

Hi guys
Transferred entire system today to a new car.Antilaser with Bel antenna connected to add on module with GPS connected to it and Bluetooth add on as well
Switched on and I get radar disconnected error message.
Everything is connected!
Double checked cables and can't see any problem and was working fine in other car.
Have done resets, though I believe this is only for the AL, but makes no difference.
Any suggestions?
Can it be plugged into any other outlet on the control box to check if it works?
Is it more than likely the add on though the GPS works fine, or is it the antenna?
Can the antenna somehow be dead and it picks this up
Would appreciate someone's help
Thanks

What make/model?