Remote Wonder II won't work

My Remote Wonder II doesn't work, no matter what I do. I can still get
the original RW to work, but not RW2. The one I have has a round base
unit with no light on it (unlike the original, which has a light).
When I load the RW2 software, reboot, and plug in the base unit,
Windows XP recognizes that base unit, but the icon doesn't load in the
system tray (if I then plug in the original RW base unit, the icon
does load).

I recently reloaded XP and all my programs onto a clean system but
still could not get RW2 to work. I've tried various suggestions I've
seen on the Web but not work for me.

Any suggestions? Thanks.