directx sample compile problem

hello
in directx 9.0 sdk sample browser there is c# sample stencil mirror which has flying helicopter.
I have june 2006, april 2006 releases also
when I try to compile sample I have this errors, any way I compile this thanks

C:\DXSDK\SAMPLES\C#\Common\D3DApp.cs(219): The type or namespace name 'SamplerStates' could not be found (are you missing a using directive or an assembly reference )

C:\DXSDK\SAMPLES\C#\Common\D3DApp.cs(220): The type or namespace name 'TextureStates' could not be found (are you missing a using directive or an assembly reference )

C:\DXSDK\SAMPLES\C#\Common\D3DFont.cs(40): The type or namespace name 'TextureState' could not be found (are you missing a using directive or an assembly reference )

C:\DXSDK\SAMPLES\C#\Common\D3DFont.cs(41): The type or namespace name 'TextureState' could not be found (are you missing a using directive or an assembly reference )

C:\DXSDK\SAMPLES\C#\Common\D3DFont.cs(42): The type or namespace name 'Sampler' could not be found (are you missing a using directive or an assembly reference )

Game Technologies: DirectX, XNA, XACT, etc.2

Did you ever get an answer on this

I have had a similar discovery downloading a demo from C# Corner

(http://www.c-sharpcorner.com/UploadFile/tomwells/Generate3DPlotUsingDirectX11292005070303AM/Generate3DPlotUsingDirectX.aspx ArticleID=200acb43-bd4d-4156-a8d8-ff5dd8502488)

The odd thing being that the DirectX references and using directives are there....

You might want to try dropping the references and re adding them, this makes sure you are using the current ones.