iPhone 4 doesn't sync

[big"o"]

i've uninstalled and installed the latest iTunes version, plugged in my iPhone 4 and nothing happens. I show my iPhone under devices with a re-charge battery and eject symbol, but to the right all that comes up is a white screen with iPhone in the middle...that's it! Nothing happens after that. I've also restarted my computer. I'm currently running Windows Vista. What's up with this?!?! I want to sync my music but it doesn't let me. Sorry in advance if this is a common post but I'm really frustrated right now...

Thanks for the response.

 

[macingman]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5)

Try a different USB port.

 

[big"o"]

just tried the different usb ports and now a "auto play" window pops up everytime I connect my iPhone. plus, when my iPhone is connect to the computer iTunes freezes now iTunes is fine when my iPhone is not connected...any more ideas?

 

[enoC]

http://support.apple.com/kb/TS1567