I am sure you will be pleased to know that after I updated my driver(Intellimouse)from Microsoft,I can now use my wheel on my cordless microsoft mouse with FOW Explorer (lefthand panel only). I am slightly surprised about this as (i) I updated when I first obtained Windows XP (ii)It has worked with all of my other programs. As an aside, the download from Microsoft for the Windows XP driver came up with the statement that it had not been approved by Microsoft? So what are to make of that!! David (puzzled)