How to enumerate attached gemecontroller devices

hI;

I try the following way to enumerate only the plugged gamecontroller devices to the system. But it takes the installed one also.

// enumerating the Game controller devices attached
if (FAILED((hr = m_lpdirin8DirectInput->EnumDevices(DI8DEVCLASS_GAMECTRL, &EnumDevicesCallBkFunc,(LPVOID)this, DIEDFL_ATTACHEDONLY ))))
{
ASSERT(FALSE);
SAFE_RELEASE(m_lpdirin8DirectInput);
}

i have a Microsoftsidewinder forcefeedback wheel and in the controlpanel it is showing the status as OK and not connected alternatively.

What is wrong with this? Can anybody help me?

Thanks,
Rohan.