d3d Light

hi, i learn d3d. directx light on and model black? setting: //------ D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_DIFFUSE| D3DFVF_TEX1 //------ D3DMATERIAL9 Material; ZeroMemory(&Material, sizeof(D3DMATERIAL9)); Material.Diffuse.r = 1.0f; Material.Ambient.r = 1.0f; Material.Diffuse.g = 1.0f; Material.Ambient.g = 1.0f; Material.Diffuse.b = 1.0f; Material.Ambient.b = 1.0f; Material.Diffuse.a = 1.0f; Material.Ambient.a = 1.0f; d3daygit->SetMaterial(&Material); D3DXVECTOR3 Direction; D3DLIGHT9 LightSource; LightSource.Type = D3DLIGHT_DIRECTIONAL; LightSource.Range = 1000.0f; LightSource.Diffuse.r = 0.5f; LightSource.Diffuse.g = 0.5f; LightSource.Diffuse.b = 0.5f; LightSource.Diffuse.a = 1.0f; Direction = D3DXVECTOR3(0.0f, 0.0f, 1.0f); D3DXVec3Normalize((D3DXVECTOR3*)&LightSource.Direction, &Direction); d3daygit->SetLight(0, &LightSource); d3daygit->LightEnable(0, TRUE); d3daygit->SetRenderState( D3DRS_LIGHTING, TRUE ); d3daygit->SetRenderState(D3DRS_NORMALIZENORMALS, TRUE); d3daygit->SetRenderState(D3DRS_AMBIENT, D3DCOLOR_COLORVALUE(0.5, 0.5, 0.5, 1.0));