movi

hi all , please help me to solv dis prob ! m not able to play hd movi on my desktop. my pc cofig is : p4 2.66 gransdale 1256 mb ram 64 mb n vidia ge force4 mx 4000 (AGP) what can b the problem ,as i don't hav onboard graphics. s ther is prob with graphic card . i am trying hd movi files with...