My app store refuse to downlaod any program and didn't sign in

Howdy there Dr.dexter,

It sounds like you are unable to sign into the iTunes and App Stores, and so you cannot download any apps. I would start by quitting the Settings, App Store, and iTunes Store apps:

Force an app to close in iOS

1. Press the Home button two times quickly. You'll see small previews of your recently used apps.
2. Swipe left to find the app you want to close.
3. Swipe up on the app's preview to close it.

When you have done that restart the device and that should allow you to log into your account so you can download your apps. :

iOS: Turning off and on (restarting) and resetting

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