Iphone won't connect to itunes? - 4

I have an iphone 5. It would connect perfectly fine until a few days ago. I plug in my iphone into my laptop and it makes the sound and everything, but it won't show up in itunes. So i can't sync it. I've tried just about anything. Itunes is up to date.

Make you your phone is unlocked and that your iPhone knows to 'trust' the PC. If already done that make sure your iTunes is the default programme for your iPhone.