I got a new iPhone 4 Charger and now my iPhone won't sync?

A couple days ago I had to buy a new charger for my iPhone 4 because the one that came with my iPhone broke. When I plug my phone into my computer it will charge but it won't sync to my iTunes and I have my setting set to automatic sync. My computer and iTunes updates are all up to date.

You should connect your iPhone directly to back of computer's case(where mother-board ports exist) with the original iPhone cable and without any cables in between.