Hi Joetampa & aa834737,
It seems to be an issue with the connection of the Slingbox, probably you are using a long Ethernet cable or SlingLinks to connect the unit to the router. That could create conflicts with the firmware update. To fix this issue, we recommend to connect the Slingbox hardwired to the router using a regular Ethernet cable no longer than 7ft. Have a look at this link about the firmware update issue when you are using SlingLinks,
Let us know how it works.