Having trouble with pointers

#pragma once
#include <d3dx9.h>

class Mesh
{
public:
	Mesh(string FileName, LPDIRECT3DDEVICE9* pDevice);
	~Mesh(void);

	// Loads a mesh from an X File
	bool LoadMeshFromFile(LPCTSTR fileName);
	// Render's this mesh
	void Render(void);

private:
	LPD3DXMESH              pMesh; // Our mesh object in sysmem
	D3DMATERIAL9*           pMeshMaterials; // Materials for our mesh
	LPDIRECT3DTEXTURE9*     pMeshTextures; // Textures for our mesh
	DWORD                   dwNumMaterials;   // Number of mesh materials
	LPDIRECT3DDEVICE9*		Device;
};

#include "StdAfx.h"
#include "mesh.h"
#include <strsafe.h>
#include <string>

using namespace std;

Mesh::Mesh(string FileName, LPDIRECT3DDEVICE9* pDevice) : pd3dDevice(NULL)
{
	if(Device != NULL)
	{
		Device = pDevice;
		LoadMeshFromFile(LPCTSTR(FileName.c_str()));
	}
}

Mesh::~Mesh(void)
{
}

// Loads a mesh from an X File
bool Mesh::LoadMeshFromFile(LPCTSTR fileName)
{
	//Ommited, because it works, and is not source of error
}

// Render's this mesh
void Mesh::Render(void)
{
	// Meshes are divided into subsets, one for each material. Render them in
	// a loop
	for( DWORD i = 0; i < dwNumMaterials; i++ )
	{
		// Set the material and texture for this subset
                // ERROR ERROR ERROR ERROR ERROR ERROR
		Device->SetMaterial( &pMeshMaterials );    
		pd3dDevice->SetTexture( 0, pMeshTextures );

		// Draw the mesh subset
		pMesh->DrawSubset( i );
	}
}