Activation server
My iPad could not be activated because the activation server cannot be reached.
the write to me try to connecting your iPad to iTunes to activate it.
when i try again to activate it nothing happens.!!
iPad Air
I'm sorry to learn you are unable to activate your iPad. I'm sure many people here would be happy to help you. Having a little more information would definitely help.
Just to make sure : you tried to activate the device both over Wi-Fi (or cellular) and using iTunes on an OS X or Windows computer, and it failed on both occasions?
Was the OS X or Windows computer using the same Internet connection as when you just tried over Wi-Fi? Have you tried using another Internet connection?
Were you using the latest version of iTunes (see Get the latest version of iTunes - Apple Support to learn how to update iTunes)?
Is your iPad a Wi-Fi + Cellular model? Is there a SIM card in it?
Are you able to restore your iPad using iTunes on your OS X or Windows computer (see If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support for instructions). Can the iPad then be activated?