Why won't my camera recognize my lens

I recently received a Sony Emount 50mm 1.8 and when I connected the lens to my Sony A7ii camera it is not recognized and I can't control the focus or aperture of the lens. I double checked to make sure the camera still worked with canon lenses and an adapter and they don't have any problems. This is my first Sony lens for the camera and would expect it to have less problems than the canon lenses with the adaptor. Any ideas?