My iPhone power button isn't working?

The title explains it all. Just an hour ago, my iPhone 4 power button (NOT the home button) isn't working. It isn't clicking, it seems like the button is stuck or jammed into place. Is there any specific way to fix it before I take it to the Sprint store and Apple store?

Settings > General > Accesability >Assisitive Touch (Turn on)

youre welcome, this is tempoary. You might have to get a new phone. (i did)

Very small things, I'm talking like a grain of sand, can jam that button. If you have some kind of mini-vacuum try to suck up any dust or dirt that may be jamming in between the button and the case wall. That's what I did. Otherwise have it dissasembled by a professional. You might also want to try it at different angles (lean the button left or right when you click it) that might work too.

I plugged up my phone and it automatically came on

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