Server2003 too Server2008

I create the databases but don't look after the hardware.

A client using Terminal Server is in the process of upgrading from
Server2003 and SBS2003 to the 2008 equivalents. A number of built-in
functions such as Format and Date are causing problems.
As an example, I created a new database with a form displaying Now() Date()
and Format(Date(), "dd/mm/yy"). When in its own database, the form
displayed correctly, but when exported to an existing database it didn't,
which makes me think that something about the structure of an empty database
has become corrupted.
Any suggestion please?

Many thanks

Peter Kinsman