Graphics error failed initializing graphics

[poppen94]

Hi i try recently to download emulator but when i try to lauch it i have error message :

Graphics error

Failed initializing graphics. Try upraging your graphics drivers and directx 9 runtime

Would you like to try witching to openGL

Error message

D3DX DLL not found! Try reinstalling DirectX

when i click on yes i have this message insufisant open gl pilote detected


What is the probleme please ? thks !