Why won't my iPhone show up when I plug it into the laptop?

Okay, so I was trying to edit a photo on a website which meant I had to plug my iPhone into the laptop the get the photo up. I've done it before, but when I tried it the second time, my phone won't show up when I plug it in? ITunes is working fine and everything though. So what do I do?

Try plugging it into another USB slot. Usually a message comes up that the laptop is downloading comparability so the iPhone can connect, DO NOT CANCEL THIS or the iPhone will not sinc.

You could always try emailing the picture to yourself and opening it on your laptop for a quick alternative while you try to fix the problem.