What could be the problem?
Please give us more information about your setup. What devices you use, bluetooth or ant+, etc…
One thing to be careful of is that these sensors want to pair with any device or app that is looking to connect. If you have or had them connected to an app on your phone, like the Wahoo fitness app or another Wahoo app, then the sensors might be paring to your phone and not to Zwift. Try and make sure that no other devices are looking to pair with your sensors.
Thanks Bob for the information, all working now.
Thanks Bob, the problem is solved. Thanks for your help.