Hi, I'm preparing submission the app to app store, but I'm stuck on "Authenticating with Itunes Store" step and got error -22421.I have check the cerificate and profile, there is no problem. And before uploading, i have validated the app, and it was success.But when submitting always failed. Are there any solution for this case?In some forums, like stackoverflow, they said the problem come from apple server. I dont know is it correct or not.Any suggestion for this case?