Links in XP missing but not in 2000

Hello,

we developed a main application with numerous links to little sheets. The
settings are so that if opening the main application all links are NOT
evaluated, the old values are kept. Now, we expierience that in a mixed
environment of 2000 and XP, in XP the values of the links dissapear They are
0. All Excel settings that are related with links are the same, however. The
only difference in XP is that one can be prompted not te be asked about the
link and that setting is not changed.

How is it possible that opening the same file in 2000 the links are kept and
in XP not?

Rob