Stuck setting up cisco aps catalyst 9100ax

Hi there!

Im setting up 4 aps cisco Catalyst 9100 ax with embedded controller and I am stuck.

I configured one AP with Master role, set the AP ip and the controller ip etc... And all runs fine, but when I boot the others 3, they allways boots as independent máster controller, instead off slave role to join master controller.

I didnt find too much info, if spmebody can help me would be too much apreciated. Thanks