Tracking changes made in ASP ?

Hi

One of the products I support is configured using asp pages and sits on either SQL or Oracle.

From time to time there are problems with the web files being out of synch with the database

Currently other than looking at the content of the asp pages to see if anything has changed
it is difficult to ensure that client's are using the correct version.

Client's handle their own upgrades so currently we advise them to check the datestamp on all asp files to see if they match up with what we have for a particular product version.

Do you know of any comparison tools that could be used or a reasonably simple way to track changes ?