The breather at the back should suck air in with the engine running, the PCV valve in the front should supply enough vacuum into the engine to allow the breather/filter to draw air into the engine. Is the PCV hose connected to a manifold vacuum source? If your engine has excessive blow-by it can overcome the PCV vacuum and blow oil vapor out though. I am still not sure if you have the connections hooked up in the right spots, and PCV hose hooked to manifold vacuum and also if your baffles (inside the valve cover) are either missing and/or possibly clogged.
If need be you could run the hose from breather filter down the engine into a catch can and some people let them puke onto the ground too. Old school engines before PCV systems were implemented used to do it that way from the factory (aka draft tubes).