There are a few things you can do ill talk you through it First restart your iPad
What I'm going to do is try a few things to see with one works so stay with me
now try to reset your password XXXXX your coumputer
I am in my ipad settings, and can't find any way to reset my password. I presume you do mean my ipad, not my computer.
What i meant is you have to reset it when your computer you can't do it on your i pad
The password XXXXX XXXXX for itunes and istore. I'll open that in my computer, and see if there is a way to reset the password. This will take a couple of minutes.
I reset my apple password. But when I tried it on my ipad, it still didn't work.