I find problems with elements ActualHeight = 0 and Number Fixed of Pages = 1

This fix resolve this problems:
At line 179 :   
`bool? result = printDialog.ShowDialog();
//Add this two lines:
            reportContainer.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
            reportContainer.Arrange(new Rect(0, 0, reportContainer.DesiredSize.Width, reportContainer.DesiredSize.Height));` 

now i've all objects in more pages...