This is quite an interesting issue you are running into. The first thing I want you to do for troubleshooting is to hard reset the Slingbox back to factory settings, then rerun the setup as if it's an initial setup. Linked below are the web pages you'll need to perform these steps:
Please get back to us if the issue reoccurs after performing the aforementioned steps.
Best of luck!
Sling Media Forum Moderation Team
*** Edited to observe Slingbox Answers Forum House Rules by Moderator. ***
a few days after this happened the sling completely crapped the bed. I could no longer connect, and couldn't even hard reset it. I had to replace the power cord and then I could finally reset it, but I don't think the cord had anything to do with this problem.