Thanks for participating in our online forum community here! I'm sorry to hear that you're having an issue viewing your cable through your Slingbox from a remote location. First thing I would advise would be to make sure that you have everything connected properly and remember to complete Setup on Slingbox.com from the home location.
Here is a comprehensive look at everything you need to start watching your TV anywhere:
Hope this helps!
The Sling Moderation Team