I would look to the router and its firmware as the first possible problem. I have had a similar problem with a Linksys router. Everything was great for months, then it started giving me that error. I moved to D-Link and have not had a problem since.

The other "gem" that I recently purchased was a powerstrip with an Ethernet jack. I can now "power cycle" up to 8 devices from anywhere in the world. That would solve your middle of the night issue. Here's a link to that site:

http://www.digital-loggers.com/lpc.html

I am having the same problem.  I can see the SB and video stream when I connect locally on my router 192.168.1.100.  However, I can't seem to connect remotely.  The SB Wizard has never been able to see my SB even though it's all connected to the same router, all firewalls are down, and the Linksys WRT54G is set up with port forwarding.  I can ping the SB with no problem and see even see the MAC address of the SB over the internet.  However, no video stream.

 I assume that I need to be able to select the "Network Settings" option under the "Slingbox Configuration" tab.  HOWEVER, that option is greyed out and I can't even select it. 

With no way for the SB Wizard to even recognize that I have a SB and no way to select the "Network Settings" option for me to connect to the SB remotely, how can I possibly set up the SB? 

This has been an EXTREMELY frustrating experience.  It can't possibly be this hard!  PLEASE HELP!  I'm at the end of my rope and thinking of returning this thing.  HELP!!!!