I see you have a pair of Grado's hooked up to it. I have a white slider and sr225 Grado's with the Grado adapter. I can't fit the adapter into the port without taking the case off. The plug only goes in a little bit. You? Did you do something to get it to work?
Edit: I see you don't need an adapter with your Grado's. But the end of your headphones looks exactly like the adapter i have.