Ribbonbar , Button and RadPageView

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C#

UI

Telerik

hi...
I have Ribbonbar that contain some button , and i have some radPageView
i want to i click on the button that show the first radPageView and when i click the second button that show the second radPageView ....etc.
i use that code but not working

private void radButtonElement1_Click(object sender, EventArgs e)
{
    radPageViewPage1.Show();
}

thanks for your help.