How to set MapRotation in FLexViewer 3.1

Hi all,

I've downloaded the arcgis api for flex 3.1 (uncompiled), and the arcgis viewer flex 3.1 (uncompiled).
And I'm working with Flash Builder 4.6.

I am trying to set map rotation on my source code for FlexViewer. How can I do that?
On my index.mxml I am getting errors.

Thank you