Mouse button bindings

Hello,

On one of our Solaris machines the user has managed to destroy his mouse key bindings. Usally if he clicks the middle button it presents some applications but now it just minimises the CDE panel to the top. I have compared his /usr/dt/config/C/sys.dtwmrc with another machine that is working correctly but there is no difference in either file is there another file I need to edit?

This on Solaris 8 by the way

Thanks,
Will