Authentication window while accessing safe activex control

Hi,
I have made an acivex control as safe by implemeting following 2 methods.
I am getting authentication window, while accessing this control in
internet 
zone.
How to prevent this dialog. Please help me


HRESULT STDMETHODCALLTYPE 
	CTCSCADataSignerCtrl::XObjSafe::GetInterfaceSafetyOptions( 
		/* [in] */ REFIID riid,
        /* [out] */ DWORD __RPC_FAR *pdwSup****tedOptions,
        /* [out] */ DWORD __RPC_FAR *pdwEnabledOptions)
{
	METHOD_PROLOGUE(CTCSCADataSignerCtrl, ObjSafe)

	HRESULT retval = ResultFromScode(S_OK);

	// does interface exist?
	IUnknown FAR* punkInterface;
	retval = pThis->ExternalQueryInterface(&riid, 
					(void * *)&punkInterface);
	if (retval != E_NOINTERFACE) {	// interface exists
		punkInterface->Release(); // release it--just checking!
	}
	
	// we sup****t both kinds of safety and have always both set,
	// regardless of interface
	*pdwSup****tedOptions = *pdwEnabledOptions = dwSup****tedBits;

	return retval; // E_NOINTERFACE if QI failed
}


HRESULT STDMETHODCALLTYPE 
	CTCSCADataSignerCtrl::XObjSafe::SetInterfaceSafetyOptions( 
        /* [in] */ REFIID riid,
        /* [in] */ DWORD dwOptionSetMask,
        /* [in] */ DWORD dwEnabledOptions)
{
    METHOD_PROLOGUE(CTCSCADataSignerCtrl, ObjSafe)
	
	// does interface exist?
	IUnknown FAR* punkInterface;
	pThis->ExternalQueryInterface(&riid, (void * *)&punkInterface);
	if (punkInterface) {	// interface exists
		punkInterface->Release(); // release it--just checking!
	}
	else { // interface doesn't exist
		return ResultFromScode(E_NOINTERFACE);
	}

	// can't set bits we don't sup****t
	if (dwOptionSetMask & dwNotSup****tedBits) { 
		return ResultFromScode(E_FAIL);
	}
	
	// can't set bits we do sup****t to zero
	dwEnabledOptions &= dwSup****tedBits;
	// (we already know there are no extra bits in mask )
	if ((dwOptionSetMask & dwEnabledOptions) !=
		 dwOptionSetMask) {
		return ResultFromScode(E_FAIL);
	}								
	
	// don't need to change anything since we're always safe
	return ResultFromScode(S_OK);
}

thanx in advance
Param