Need help: direct x, drivers

Hey,

I just got my new computer last week,
And I installed warcraft 3, it worked fine

Now today I reformatted my hard drives, and installed warcraft 3 again
It says: warcraft 3 was unable to initialize directx. Please ensure you have 8.1 or higher and that your display drivers are current.

Well, when I go to dxdiag, it tells me: Direct-X version: DirectX 10

Thats 8.1 or higher right??

Or is there something wrong with my drivers??

I don't know anything about drivers I just reinstalled my vista and formated my drives, so I don't know what happened


Thanks!!