ChangeSectionPageOrientation() not work

[kity]

// This is totaly not not work
RadRichTextBox.ChangeSectionPageOrientation(PageOrientation.Landscape);
1. Make simple application
2. Set Document of RadRichTextBox
3. Set print orientationthis.RadRichTextBox.Document = myDocumentGenOutput;

this.RadRichTextBox.AllowScaling = true;      this.RadRichTextBox.ChangeSectionPageOrientation(PageOrientation.Landscape);           
this.RadRichTextBox.Print(this.PrintOptions);  4. Result -> Printed page is not Portrait not Landscape6. myDocumentGenOutput: RadDocument is generate with

set correct Orientation 
myDocumentGenOutput.Orientation = PageOrientation.Landscape;

..