'TextureState' and 'Sampler' not found

[Waldofrido]

-at line:
private TextureState textureState0; and
private TextureState textureState1;

Error    1    The type or namespace name 'TextureState' could not be found (are you missing a using directive or an assembly reference?)    C:\Virii\Ovorp\Graphics\D3DFont.cs    40    13    Ovorp

- at line:
private Sampler samplerState0;

Error    3    The type or namespace name 'Sampler' could not be found (are you missing a using directive or an assembly reference?)    C:\Virii\Ovorp\Graphics\D3DFont.cs    42    13    Ovorp

i'm with Visual Studio 2005 Professional Edition and with Direct X9 SDK installed.
How can I solve this problem?

[Waldofrido]

i solved myself, but other problem happened:

i'd download the Virii.zip latest version, and when i compiled the solution, i have to replace the lines:
private TextureState textureState0;
private TextureState textureState1;
private SamplerState samplerState0;
private RenderStates renderState;

from the lines:
private TextureStateManager textureState0;
private TextureStateManager textureState1;
private SamplerStateManager samplerState0;
private RenderStateManager renderState;

otherwise the solution don't compiles.
now, when i'll run the project "OvorpServer_Virii", the program show me a message: The working directory does not exist: 'Z:\LocalRepository\Ovorp\TestEnv'.
and not run.
I don't have a partition Z:\, and i'd modificate only the lines above.

can anyone to help me?
thanks a lot.
André