Mobile Device Center. I have no trouble connecting this DC to XP with Active Sync through a serial cable. With Windows Mobile Device Center the DC knows the computer wants to connect so I hit yes on the DC but Mobile Device Center just spins and spins waiting for a driver. Does anyone know the secret handshake to get this connection to work? Fortunately I still have a Windows XP laptop which I use to download but occasionally it's convenient to do it with the desktop. This is at the office.