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.
If your specific model is not in the list, I would recommend choosing a model from the list that is relatively close to yours. You can search our list here:
Sorry about not being able to find our number. You can find that at the link below:
Hope this helps,
Very surprised this has been marked as Correct ? I don't believe that "Throw away your cable box and buy another that we support" is a valid answer, in fact I think it is rather arrogant. It is Sling that should support the cable box not the other way round. This user has just spent a lot of money on the M1 and should be expected to spend even more just to make it work..
I can only assume it was Anthiny who marked it as correct ? and I would question the validity of that. Surely it should be the person who asks the question who decided if the answer is correct, not the person who provides a possible answer.
Anyway, my contribution is for Bill to try the Custom Remote that I built for the Motorola VIP 2000 (follow the link). And I will let him decide if that is a correct answer.