Volume stopped working...

Recently I used my headphones in my iPad and since then, the volume does not work on anything. I noticed at first it said headphones on the volume control but there were no headphones attached. I turned it on and off and nothing. I reset all the setting back to factory, nothing. When I go into settings, its turned on and if I switch the sound effects, I hear those just fine. But nothing else works... no games, music, allerts... nothing. Does anyone know what is going on?

I am using the first iPad... 64gb 3G.

Thanks...

Jayme