I just purchased a Slingbox Tuner. I have it set up to my cable modem. I split then line and hooked it up the the router. Everything is working smoothly except it wont allow me to set up remote viewing. I keep getting to the screen and it says "Check this box to watch your Slingbox outside your home network." So I do since I want to able to and then I get to the next screen which is "Router Configuration." I choose "Fully-Automatic" and continue and arrive at a screen that says "Your Slingbox assistant could not automatically change the port setting on your network router. Some possible reasons for this are:" Your network router either has UPnP or NAT-PMP features disabled, Your router does not support UPnP or NAT-PMP features disabled, your router can't be set automatically. I have a Belkin N1 Wireless Router. What do I do?