MultiTexturing

I wanted some objects in my game to be multitextured so i used pixel shader but i want this effect on certain object only. but the effect of multitexturing appeared on every object that are drawn after setting

Device->SetTexture(ShadeTexDesc.RegisterIndex, ShadeTex);
Device->SetSamplerState(ShadeTexDesc.RegisterIndex, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
Device->SetSamplerState(ShadeTexDesc.RegisterIndex, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
Device->SetSamplerState(ShadeTexDesc.RegisterIndex, D3DSAMP_MIPFILTER, D3DTEXF_LINEAR);

where ShadeTexDesc.RegisterIndex=2 every other objects drawn after that are multitextured despite that the vertex format of this objects doesn't allow that

struct Vertex
{
	float x,y,z;
	float u,v;

	Vertex(float X,float Y,float Z,float U,float V)
	{
		x=X;
		y=Y;
		z=Z;
		u=U;
		v=V;
	}
	static const DWORD FVF;
};

const DWORD Vertex::FVF =D3DFVF_XYZ|D3DFVF_TEX1;

So does anyone knows the reason or what i did wrong thanks in advace;