Help needed with Fluent interfacing
 

Hello,
I am looking on the forum for some help regarding fluent .
I have generated a mesh in ansys meshing . My geometry has 2 parts- CV and a moving mesh cylinder which contains turbine blades, this cylinder has been given rotation. i have applied all BCs. When i was interfacing, fluent reads the surface of contact for CV and Moving cylinder as a wall .as a result when when i run my case the body is detecting the interface between the cylinder and CV as a wall. I guess i have some mistake in my Interfacing. I am doing it for the first time . could someone please guide me through.....?