My iPhone 4S won't sync with iTunes?

I plug my phone in with 2 different charges to see if it was the cord & they both do the same thing. It buzzes & beeps & my computer recognizes it but it shows no devices in my iTunes. I've gone through & tied everything. Even going into control settings. I don't understand why it's not syncing. I have a PC. I deleted iTunes & reinstalled it, I shut it down, I restarted my phone. Everything. Nothing seems to be working.

Did you Authorize the Computer in Itunes through the Store menu so that it is added under your Apple Account?
Also
When the above is true. Make sure the same account in iTunes is the same one in your iPhone settings > iTunes & Stores settings.