2008 Civic EX Coupe /w Navigation, but the AUX tab never shows up.
 

So I purchased this car today from a used car deapership, I love it. Now I'm trying to figure out how to get the AUX tab to show. I am now aware that once you plug in an AUX plug into the aux Jack then it will detect a compatible device and a tab show up on the navigator, but no matter what I do and how hard I try I can never get the tab to show up. What's the problem?