Iphone 4s iOS 7.02 volume bar doesn't work.

My IPhone volume does not work without headphones. There is no volume bar in music and the volume buttons on the side do not increase the volume from zero.

iPhone 4S, iOS 7.02 till now. I reset it a lot of times with iTunes but doesn't work I cleant the dock connector some times it works but al lot of times I am listening music and it stops half way.

Ps. My English is not so good I am Dutch.