I am trying to sync my PalmOne Treo 650 via Hotsync running on XP Pro SP2 inside Parallels Desktop. I have tried builds 1970, 3036, 3120 all to no avail. I have a MacBook Pro Core2Duo with 2GB RAM. The bluetooth device is not visible. The USB cable does not show up as a device. Sync via both of these works fine on the Mac. I have tried disabling/enabling HotSync on the mac host; creating virtual serial ports for bluetooth (parallels just says the device is busy) and everything else I could think of. I simply cannot get windows to even recognise the device. It syncs fine via Windows on another box, and via Mac on this box. About a month ago, I managed to sync it once by using the cable and selecting the USB device in parallels' USB device list between pressing the sync button and HotSync Manager kicking in. Parallels managed to 'take over' the sync. I have since been unable to replicate this feat. Obviously this is not a desired modus operandi, even if it did work. Please help. I am perplexed by how hard this is.