IPhone 4s not connecting properly?

I'm trying to sync my iPhone 4s with my computer. I have iTunes (The latest version at the moment - 11.1.4.62) But the iPhone is not registering to be connected. There's still the sound of connection, still gets charged when plugged in, and I get a message asking if I trust this computer (I always choose trust). But the iPhone never appears in iTunes. The iPhone is also fully updated (iOS 7.0.4). This is a new development, It just started happening very recently. I have always been able to sync it before. I can also access the photos via My Computer. I have tried turning it off and on again.

Added (1). Tried turning off both and back on.

Were you turning on and off the iPod or the computer? When I had this problem a restart of the computer solved the problem.

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