Help HTC Sync no connect, disk drive&debug set

[ncsttsccr]

So i've dl'd htc sync, i have usb debugging checked, i have sync open on my computer, and i plug the phone up and click disk drive...

htc sync still says disconnected

if i change on the phone to htc sync, it will search but cannot find htc sync

any suggestions as to how to get them to play nice?