Is mesh particles only for Pro?

I tried to create a mesh particle with zero success . I even imported the sewer assets into my project and imported the particle mesh from there and it does not work. Does any one know what common things for me to check and make sure i’m doing things properly? I read the manual and it does not say anything about needing pro to use them and I followed the directions in the manual but the mesh simply wont emit. Any help will be greatly appreciated.

I have a mesh particle emitter and Unity I’m not using Pro. I added the mesh particle emitter to a standard particle system, removed the normal particle emitter, then dragged the mesh from a model onto the field in the emitter.

I don’t understand. I cant seem to get it to work.