I have an iphone 4. It's been working perfectly fine until the other day I wasn't able to play music. If I press the volume on the side it won't go up or down. I can't listen on youtube, pandora, or my itunes. I can call people and put them on speaker and it will be fine. The only thing I can think of that I did was put it on my ihome docking station. I recently did it for the first time and I am kind of guessing the problem. It still plays music through the ihome but it won't play through headphones or speaker. If someone could help me fix this, that would be great