Thanks for reaching out to us in the land of the forums. We do apologize that you are having some issues with the connection. Something could have happened after you un-plugged it It is possible that the Slingbox needs to be reset, especially since it is not wanting to connect back up to the router.
Down below, we have provide a link that will show you how to reset the device, and the reasons why we do this:
How to reset your Slingbox to factory settings
After the reset, it will be necessary to go in and actually set up your Slingbox again:
Hope this helps!
The Slingbox Moderation Team