Android Question keyboard covers edittext on StdViewPager

Hi, I have a LoginPage as a First page of my StdViewPager,

The keyboard works great when the application start, do'nt covers the user and password edittext's,

but the problem is when I return to the LoginPage from another page.

Now the layout don't move to up, and then the keyboard covers the user an password edittext's.

I know the IME library, but this not work in this case.

Some Idea.?

Thanks