Unable to sync RBS40v with CBR750

I am unable to sync my RBS40V with my router (CBR750). I have done the factory reset on the RBS40V. I have installed the latest firmware. I tried adding the satelite via the web site, the mobile app, and by pressing sync on both router and satelite. If I connect the router to the satelite via ethernet cable, it can see it. What am I doing wrong?