Help with my Wahoo Kickr setup


Completely new to direct drive smart trainers and need some help.

I have juat bought a second hand Wahoo Kickr Gen3. It has an SRAM 11 speed cassette on it. I have a Shimano 105.

When I put my bike on the trainer, when i try switch to the smallest cog on the cassette it keeps going until my chain drops off. I also cant switch to the largest cog on the cassette.

Can anyone explain what I need to do to get this all working?

Thanks in advance!

Have you tried to watch a YouTube video?

Yes, I have googled before posting. Not sure why the chain is coming off and can switch past the smallest cog.

Is your Shimano 105 derailleur 11 speed? If it is, I would first try reseating the cassette on the trainer and make sure its on there correctly.