My new 2015 Honda Civic EXL does not have a 3.5mm port to plug in an MP3 player. However it does have a USB port. So I bought a USB (female) to 3.5mm (male) adapter to plug in my MP 3 player . . . but no joy, it doesn't work If I plug in a USB flash drive with music it works fine. Apparently my MP3 player is not recognized, WHY?