Formula in Data Access Page

[dar149]

I created a data access page from a query that I can view on the Web. However when I add the following function to the query, the data access page will work from within Access, but will not display on the Web:
Maximum Date: Maximum([SAF-A01-000-Date],[SAF-002-LP-Date],[SAF-A02-000-Date],[SAF-A03-000-Date],[SAF-A04-000-Date],[SAF-A05-000-Date],[SAF-A06-000-Date],[SAF-003-LP-Date],[SAF-Hld-001-Date],[SAF-Hld-002-Date],[SAF-Hld-003-Date])

Any Ideas??
Thanks