one other thing...
upnp has to be enabled in both your router and your ps3 in order for this to work. if you still don't know how to enable upnp in your router, make sure it can do it in the first place, and if not, you may need another router. (enabling upnp in the ps3 is as easy as going to the crossbar network settings and enabling it.)
also, don't force any network settings at this point in your media server settings. it just confuses things at this point. just make sure everything is blank until you figure out the problem.
