Well if your router is UPnP it shouldn't need port forwarding anyway, unless your router doesn't have the most recent drivers or something.

Double-check that you have a static ip externally & not a dynamic one. This is required for port forwarding otherwise the port forwarding will not work after the ip changes.

I have heard it's best to open a port separately for each of TCP & UDP (some routers give you the option of both at once.)