Whenever I fully plug in my headphones into the headphone jack on my duo 11 music doesn't go to the headphones but continue to play on the duo 11. The only way i can get it to play on the headphones is to let a quarter of it stick out. It is such a hassle...because if i put it just a little the sound goes back blasting on my speakers.....imagine me in the library. (tested on headphones without a mic doesn't work but i remember testing it on a headphone with mic and I think it did work?Something to do with the mic?) Is this a hardware defect or something is just wrong?