How to make the infragistics controls available in the toolbar for VS & Expression Blend?

I have a window with the following xaml & that compile properly ( all necessary references included).

thanks

vairam

<igx:XamRibbonWindow x:Class="WpfApplication9.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:igx="http://infragistics.com/Ribbon"
  xmlns:igWindows="http://infragistics.com/Windows"
  xmlns:editors="http://infragistics.com/Editors" 
  xmlns:igDP="http://infragistics.com/DataPresenter"
  xmlns:themes="http://infragistics.com/Themes"
    Title="Window1" Height="300" Width="504">
    <Grid>
       
    </Grid>
</igx:XamRibbonWindow>