Ok....I had an iPhone 3G that was jailbroken...it got stolen so I got a new iPhone 3GS. Now I cannot get my phone to sync. I restored it and everything. I've tried following millions of tips and nothing seems to work. I'm not sure if this problem is caused by my old jailbroken phone or not. When I plug in my new phone, iTunes starts to slow down my computer and often freezes completely; however, sometimes it will say syncing, or backing up iPhone, but it never finishes. I've tried uninstalling and re-installing everything iTunes related and that did not work either. IS THERE ANYTHING I CAN DO??? PLEASE HELP ME