Bluetooth Belt paired but no FC data showed

[cmelay]

Hi,
I have just started with my new Suito and have tried to pair my Bluetooth/Ant+ compatible Cardio Belt.
I suppose the pairing went fine (I wonder as each time I go in the FC setting, it restarts to ask if was Bluetooth or Ant+, and remakes the link without showing it was already registered before), but when I want to perform a training test, no value of cardiac frequency is displayed.
Can you please help to solve this ?
Best
Christophe