Serial De Mount & Blade I Wanted To Install NFS Most Wanted On My PC But After I Insert De Serial A Error Ocuered Saying This?

I wanted to install NFS Most Wanted on my PC but after i insert de serial a error ocuered saying this? - serial de mount & blade

Setup can not continue because this game requires DirectX9.0c or higher must be installed on your sistem.I, DirectX 9.0c, but doesen't tried Work.it or more different modified DirectX, DirectX installed in DVD and 't work.What I do? What is the problem? Thank you.