Problems with cross-refernces on captions

Hello,
I have problems with non-standart captions which we use in our documents.
I do the following:
1. I create a template and save it on net-disk.
2. I create captions - Fig. and Tab. and saved them in this template.
3. I create a number of documents on the base of this template.
4. Different people edit these documents (they open them from net-disk and
save on it).
5. After all editings I open documents and renew fields. Some
cross-references to captions (Fig. and Tab.) are destroyed - "Error! Source
is not found" (it's a translation from russian).
6. I open menu Insert - Reference - Captions and captions introduced by me
(see point 2) are absent.

What is the reason and what should I do to solve this problem?