Hey need litle help!

Hey i got problem whit sjsro.
I need to install on my pc DirectX9.0b version.
But i got newer version and that not let install older version.
But how i can istall older version ? On my pc ? Or what i most do when i want play sjsro. Or how i can uinstall that DirectX9.0b programm :S?

simply ur problem doesnt belong to dx9 coz u have a newer version whats windows u running vista?