How to fix password problem to AppStore and iCloud even if my password is correct

Hi!

I dont know even how can I start!

I have been hours and hours to fix my problems and seeking for support - it is impossible and i hate that, because it is my free time and i have restore my iPad and i have lost all my pictures of my babygirl and for nothing!

Problem, actually there is only one problem i can not log in with iPad to iCloud and AppStore - password is 100% correct, because i have log in with my AirBook and IPhone and i have log in Apple.com with my iPad!

So if i want to log in with my iPad to AppStore then there is a text:

An Apple ID verification code is required to sign in. Type your password ........... code shown on your other devices. - YES i have that code, but if i hit RETRY button, then i dont have to place where to add this verification code and there is same window what asking my Apple ID Password and then i getting new verification code. So there is no input field and i have tried to add verification code to password field and this does not work also.

I can see all three devices on Apple.com and i have version 8.0 ( can do any update )

Can someone help me?

Hoping to hear from you soon!