Pivot table in data access page on Win 98: fields OK but no detailed data

Hi

My file server runs Win 2000 Pro and has Office XP installed.

I host a data access page contaning Pivot Table on the server. In the
page body I have some reference to an lpk file on the root of the web
server.

The page works fine on PCs running Windows 2000.

But on 2 PCs running Windows 98 it has problems:

The page displays OK with all fields and all interactive funtions
well, but there is absolutely no detailed data. I refreshed, clicked
all the expansion indicator but it didn't help.

When I export the page to Excel, all data appears. Where the hell do
they hide themselves in the web page?

The PCs have Office 2000, OWC XP and have been kept up to date with
all patches & updates

What can I do?

Thanks
NB