Here is the reply that a Slingbox employee gave in November 2010 to another person experiencing W200 errors (sorry, the links to the support pages on the Slingbox website don't come through with this cut-and-paste, but perhaps you search for "Error Code W200" in the Support Forum search window to find the links.
Hi lmm and all,
The error code W200 means;
There's a problem communicating with your Slingbox. Make sure the Slingbox is on and ready for Internet Viewing. Also check network cables, and confirm your router is set up correctly.
You can double check that information at this link;
Understanding Watch on Slingbox.com error codes
It seems to be an issue with the Internet Viewing setup at home, we recommend to check the settings at home and run the setup again. Have a look at
the following links which shows some troubleshoot steps that can help you out,
Internet Viewing - Manual setup
Internet Viewing has stopped working and I am currently at home
Let us know how it works.