Mobile device not recognised.

> After the first inistall on my new Vista Home Premium I trird to sync my
> Asus
> 636 pocket pc 5.
> The first time I plugged it in Vista installed some drivers but the only
> part that the sync centre would recognise was the music part with Media
> Player 11.
> After a little research I found that I need Windows Mobile Device Centre
> which after downloading and installing quickly found my PDA and everything
> was lovely.
>
> Unfortunately after closing everything down for the night the next morning
> Vista wouoldn't recognise the PDA at all and kept saying that there was a
> problem with the device.
> I have tried uninstalling the Vista drivers but now it won't reinstall the
> drivers it was happy too only the day before.
>
> Any help would be wonderful
> Thanks
>