I cannot link my ANT Garmin dongle and speed sensor?

I just purchased a brand new Cpu, lenovo edge 2 with windows 10. I also just purchased a  new Garmin speed sensor and dongle from my local bike shop as well as a kurt kinetic trainer t2700. i downloaded the  Zwift app and when I tried to search for the ant signal it does not show up in the swift app. Do i need a Garmin cpu or is the speed sensor and dongle all i need? Is there something i am doing wrong? Please help i really want to start riding… 



Do you wake up the sensors before pairing with zwift?


when the loading screen pops peddle at a smooth rate, then search for speed sensor. and select your trainer.