iTunes could not connect to this iPad. An unknown error occurred (0xE80000015)

After an update, I tried to log into my iPad and it kept saying that my passcode was incorrect even though it worked just fine prior to the update. It is now disabled and I am not able to reset it using iTunes because everytime iTunes tries to connect to my iPad, I get the following message...iTunes could not connect to this iPad. An unknown error occurred (0xE80000015). What other options do I have in unlocking my iPad now? Because I cannot access my iPad, I cannot provide you with a Serial Number, IMEI, MEID. I can't even recall the latest iOS version that it was updated to.