Getting back to game page from xaml page problem. (Windows Phone 8.1)

I have implemented a xaml page where user can submit his score. I have managed to get the user to the xaml page, after 2 hours of struggling but I do not know how can I navigate the user back to the game page, because I got nothing but black screen.

This is the code, I used to navigate to submit score xaml page:

var frame = new Frame();
frame.Navigate(typeof(SubmitScoreDialog));

Window.Current.Content = frame;
Window.Current.Activate();

I used the same code, to get the user back to game page, after he submited his score, but I get that black screen, nothing is drawn … I do not know how can I get this working.
Here is the code from SubmitScoreDialog.xaml.cs to get the user back to game page.

var frame = new Frame();
frame.Navigate(typeof(GamePage));

Window.Current.Content = frame;
Window.Current.Activate();

If anyone can provide me the working code for this problem, I will be very thankful. :smile:

I heard the Graphics device gets suspended. You may need to un-suspend it somehow. (No clue how. Sorry).

WOW, really!? you bumped a 1 and a half year old post? :open_mouth:

To give incomplete advice? :confused: