Iphone 4 won't go into silent mode?

This morning I woke up and went to my phone as it kept going off, I then proceeded to turn the mute button on (as I wanted sleep) and to my surprise it was already on… I then flicked the mute button switch several times and it still wasn't working… I really don't want to take it to apple, because it won't be taken in for a while and my phone is not covered under a warranty anymore… Are there any other solutions besides taking it to apple?

Pity that you wouldn't also.

Go to settings… Then press sound… Then hold your finger on the line thing that the first at the top and with you right hand if your right handed pull basically with your finger. DINE. Anyway I thing your obviously not dumb and your obviously going understand everything I said made my account yesterday so id be gratefully if I got ten points and there's a question I asked called "T-mobile vivacity help" so did be gratefully if you checked it out and tried to help me out!