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.
We're having problems setting up our Slingbox on a Cox cable box that doesn't have the AV component access ports. We get to the remote setup and it does not list this Cox cable box which is made by Dolby and the model is a Pace. Anyone know why we're having problems?