How To Aim Ubiquiti's Bullet Cameras?

I just purchased an AI Pro (which I had to RMA because the knuckle part wouldn't thread onto the base). I put the camera together in my office before I attempted to install this under my roof eve. I assembled the knuckle joint to the camera and then attached that to the base that mounts to the wall. Once I did that, I couldn't adjust the aim of the camera. The camera was stuck in the straight position. I tried loosening that small star bolt but to no avail.

What am I doing wrong? Thank you.