For this issue that you are having to setup Internet Viewing, I recommend taking a look at this article:
Probably you need to setup also the other router, to confirm this, I recommend you to perform a trace route to any website and paste the results here, you can use this 3rd party site with some instructions to do that:
Thanks for the response. However, the Uverse router is the only router on my network. The Slingbox is plugged into a switch that is plugged into the Uverse router. The Uverse router connects to the AT&T network and also functions as the wireless router, VOIP device and HDTV device.
The Traceroute command confirms that there are no other routers. With my laptop, I traced both the wireless route and the wired route (from the Slingbox device) to the same website.
The first entry in the trace is the laptop and the second entry is the ISP (99-39-92-2.lightspeed.tukrga.sbcglobal.net).
Any other ideas?