New Kinetic Smart Trainer and Zwift Speeds

So I just got my new Kinetic Road Machine Smart 2 Trainer all set up with Zwift installed today. Calibrated the Kinetic on the Kinetic app after a 20 min warm up workout. Then I logged onto Zwift to try it out. After I got going, it was showing my speeds at a ridiculous amount. Like 35-46 MPH when I know I am only going at the most 15 MPH. I have a Specialized Crossroads I bought 5 years ago that’s still in showroom shape with 700 45c tires. For some reason I cannot calibrate Zwift to the size of tires I have as well. What am I doing wrong? I cant seem to find anything online that can help me out.

I don’t think you need tire size for a smart trainer.
If you pair as a classic trainer, the games thinks each revolution of your resistance unit is a revolution of a bike wheel so you go super fast.
Make sure you pair as “Power source” and controllable trainer.

That’s my guess.

Thanks for the tip! Made sure the “Power Source” was on and that made all the difference in the world. I now can ride along and it seems a little more realistic and I am not passing people going nearly highway speeds. Now I just need to get my butt used to riding again… was able to ride yesterday for a good half hour but today I could only stand the seat for about 15 min. I just gotta ride a little each day and get acclimated.