Vista - Vista File Content Search of Network Drives

I was trying to resolve a user’s error today in regards to searching the
contents of an excel 2003 file. They are looking for a specific phrase
within that file which XP can find and it seems Vista can not. This file is
on a networked, non-indexed, drive. I followed these steps



I right clicked on the folder to be searched and chose search
I went into the search options and told it to search contents of files for
non-index files
I chose advanced search and checked the box to search non-indexed, hidden,
system files.
I typed in the term 1656 and nothing comes up


If I go to XP and do search within file contents and type in the term 1656
the two excel files containing that value show up.



Is there something I am doing wrong or is this a flaw in the searching
mechanism?