FileNotFoundException at DirectX 9.0b - no problem at DirectX 9.0a

[NK2000]

I got a simple problem but havnt found a solution yet

I can compile DX code with DirectX 9a and 9b but when i try to run it under 9b then i got a FileNotFoundException and it tells me that Direct3D or a depending assembly of it is missing

I also executed the mdxredist.exe (debug version) file several times to go sure that there is no problem because of runtime
DxDiag also tells me that i got DirectX 9.0b

Does anybody know a solution?

UPDATE:

I can execute code as long as i dont call Direct3D so 2d would work fine!

 

[NK2000]

could anybody send me a small test application which is compiled using the directx 9.0b to check if i cant run 9.0b applications or if i just cant run my own compiles 9.0b applications!