Intellimouse Explorer 4.0 Scroll Wheel not working!

Hi

I cant get the scroll wheel to work anywhere in Vista - IE, Office,
Explorer, etc etc. I performed an upgrade of my XP SP2 laptop which went ok
and am so 80% happy with it. Just a few outstanding issues of which this is
one. I had the latest version of Intellisense installed v5.5 before the
upgrade and can still run it to customise the mouse functions but if i try to
uninstall it with the intent to reinstall it, the error messages are this
software is not compatible with this version of windows and a policy
restriction prevents the install of this application respectively. I have
tried using the application compatibility wizard with no luck and dont know
what else to do. There is a windows installer cleanup utility but have held
off using this as it was really desinged around the office xp era and so dont
want to risk screwing up vista stuff (YET!)

Any ideas would be much appreciated

Regards

Mike