I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/message/10363#10363
Come back if it that doesn't help either.
It is obvious that the slingbox codes for Google Fiber is incorrect, and does not work, mine included. Both the Google Fiber, And the Slingbox blogs are full of reports of this glitch. Google Fiber has a thread with the "correct bin file codes. I don't know why Slingbox seems to prefer ignoring the obvious. Come on Sling, help us out.