Animating x model

Hi guys! I have a serious problem: i'm able to load a .x file, but i can't understand how to animate it! someone knows how? i tryed using anim->AdvanceTime(time,0); but nothing changes..... heres the code i use to load the model: struct D3DXMESHCONTAINER_DERIVED: public D3DXMESHCONTAINER { LPD3DXMESH pOrigMesh; }; class CMeshHeirarchy : public ID3DXAllocateHierarchy { STDMETHOD( CreateFrame )( THIS_ LPCSTR Name, LPD3DXFRAME *ppNewFrame ); STDMETHOD( CreateMeshContainer )( THIS_ LPCSTR Name, CONST D3DXMESHDATA *pMeshData, CONST D3DXMATERIAL * pMaterials, CONST D3DXEFFECTINSTANCE * pEffectInstances, DWORD NumMaterials, CONST DWORD * pAdjacency, LPD3DXSKININFO pSkinInfo, LPD3DXMESHCONTAINER * ppNewMeshContainer ); STDMETHOD( DestroyFrame )( THIS_ LPD3DXFRAME pFrameToFree ); STDMETHOD( DestroyMeshContainer )( THIS_ LPD3DXMESHCONTAINER pMeshContainerToFree ); }; HRESULT CMeshHeirarchy::CreateFrame(LPCSTR Name, LPD3DXFRAME *ppNewFrame) { D3DXFRAME *frame = new D3DXFRAME; *ppNewFrame=frame; char *nome=new char[strlen(Name)+1]; strcpy(nome,Name); frame->Name=nome; D3DXMatrixIdentity(&frame->TransformationMatrix); frame->pFrameFirstChild=0; frame->pFrameSibling=0; frame->pMeshContainer=0; return D3D_OK; } HRESULT CMeshHeirarchy::CreateMeshContainer( THIS_ LPCSTR Name, CONST D3DXMESHDATA *pMeshData, CONST D3DXMATERIAL * pMaterials, CONST D3DXEFFECTINSTANCE * pEffectInstances, DWORD NumMaterials, CONST DWORD * pAdjacency, LPD3DXSKININFO pSkinInfo, LPD3DXMESHCONTAINER * ppNewMeshContainer ) { UINT NumFaces = pMeshData->pMesh->GetNumFaces(); D3DXMESHCONTAINER_DERIVED *mesh=new D3DXMESHCONTAINER_DERIVED; char *nome=new char[strlen(Name)+1]; strcpy(nome,Name); mesh->Name=nome; mesh->MeshData=*pMeshData; mesh->NumMaterials = 0; //max(1, NumMaterials); mesh->pMaterials = 0; mesh->pAdjacency = new DWORD[NumFaces*3]; memcpy(mesh->pAdjacency, pAdjacency, sizeof(DWORD) * NumFaces*3); if(pSkinInfo) { mesh->pSkinInfo=pSkinInfo; pSkinInfo->AddRef(); } pMeshData->pMesh->AddRef(); (*ppNewMeshContainer)=mesh; return D3D_OK; } HRESULT CMeshHeirarchy::DestroyFrame(LPD3DXFRAME pFrameToFree) { delete pFrameToFree->Name; delete pFrameToFree; return D3D_OK; } HRESULT CMeshHeirarchy::DestroyMeshContainer(LPD3DXMESHCONTAINER pMeshContainerToFree) { pMeshContainerToFree->pSkinInfo->Release(); delete pMeshContainerToFree->Name; delete pMeshContainerToFree; return D3D_OK; } anyone can help me?:(