Can I Connect My Itouch To My Mobile Broadband My ITouch Won't Connect To ITunes, Apple Mobile Device Service Starts Then Stops?

My iTouch won't connect to iTunes, Apple Mobile Device Service Starts Then Stops? - can i connect my itouch to my mobile broadband

Ok not what happened, but my friend tried the password too often and people with disabilities and should connect to iTunes, I can not, so I need help quickly. That's what I tried:

-When you click on "Edit" on iTunes in Add / Remove Programs section
"I have McAfee, if that's not it.
From my Windows Firewall
Proven re-install iTunes
-When you start to "service" in the My PC

None of them worked, so an idea?

Thanks