For this type of errors when you try to setup the Slingbox, it's necessary to check the connections between the Slingbox and the router. Are you using a hardwired connection or do you have a power/wireless bridge attached? I recommend Resetting the Slingbox to factory settings and then run the Setup at Slingbox.com; for testing purposes, connect the Slingbox using a regular Ethernet cable no longer than 7ft long. If you are using SlingLinks or a similar power bridge, have a look at this article:
I followed your recommended steps.
To answer your questions, no, I'm not using a hardwired connection to my router and yes, I am using SlingLinks.
I reset the Slingbox to factory settings (had actually tried doing this numerous times previously as well) and connected it directly to the router via ethernet cable. At least this allowed me to update the software!
I then disconnected the hard wired connection and returned the Slingbox and SlingLinks the way they were. I was briefly able to succesfully connect to the Slingbox and watch via internet (this was all one week ago, Sunday, April 2nd). I took this as a good sign. The next day, Monday, I attempted to connect from work, to see if it would work while I was on a different network. No luck.
Upon returning home Monday evening, I tried to connect again and again, no luck. I continually get "can't connect" W200, etc type errors. The network light on the Slingbox is either very faint or as dark as can be but blinks constantly. My network is fine - all computer work as does Apple TV.
Based on reading this forum over the week, I'm willing to guess that this could be the power supply issues that many seem to be having. Is that a fair assumption?
It's very frustrating having this hardware that does not work reliably in any way.