Search engine returns "No catalog"

[Robert Hartwell]

My web site host is running a Front Page compliant server.
The search engine for my web runs OK for a while, then
suddenly the catalog file for my web gets lost. The host
site has no idea why. When I update one or more pages I
get a message: Failed to update folder "catalog.wci". That
update does not stop the search engine. Days later the
problem comes back. Anybody got an idea about this problem?

R. Hartwell