like this?
but this was when i try activate thru itunes, then i restart my laptop and the ipad. and try again . it works.

probably due to server problem or internet connection.
if still have problm u can just activate thru wifi , no need to sync with itunes first

if u can olredy use your iPad, means that its activated already. want reactivate just restore ur iPad from itunes (shift click restore and select ur firmware)