I have a T-Mobile Vario3 (HTC Tytn2) running Windows Mobile 6.1 and a HTC HD2 running Windows Mobile 6.5, when I connect via USB to my WIndows 7 Ultimate 64bit PC, Windows Mobile Device Centre will launch automatically when I connect the 6.1 mobile but not when I connect the 6.5 mobile, however it does auto-sync as I have added items to my calendar an it syncs Ok even though it hasn't launched the program. if i connect to a XP machine they will both launch Activesync OK. I am not sure if this is a Windows Mobile 6.5 problem, a HTC HD2 problem, or a Windows 7 proble, has anyone else had the same problem and managed to fix it? Thanks