Try soft resetting the Slingbox. There is a reset button on the back side of the Slingbox. Press and release the button. Do not hold the button in, just press and release it.
Once the network light comes back on, try reconnecting again.
If your home router issued your Slingbox a new IP address and the Slingbox did not receive this, this could cause your W200 error. By doing this soft reset, the Slingbox will receive the new IP address and connect.
Please let me know if this worked.
Awaiting your response,
Sling Media Moderation Team