[Nimbus]

I am trying to change the heading styles used in a document to different
heading styles, ie Myheading2 to Myheading3. I wish to do this on a number
of documents so as a trial I created a macro which converted just one of the
headings on one of the documents using find and replace.
I can't get the macro to work. When I run it nothing appears to happen.
However when I go back to using find and replace manually I find all the
formatting of the styles is attached to the find and replace boxes. ie
Myheading2 is set to 16 point bold and the find box also shows that it is
looking for 16 point bold. Myheading3 is set to 14 point underline and so is
the replace box. The macro is apparently doing something.
I have set up and used this kind of macro many times when I used Word on an
XP setup. I now use Vista. Do I need to do something different on Vista?