[AccessD] Combo Box not Autocompleting

Group,

I have developed a simple database in Access XP (One table, one 
form).  On the form is a combo box that shows all the records on the 
form.  The bound field is a number (long)

When I start entering a number the combo box auto completes it with 
the first match from the list.

When I copy the database to another computer with Access 2003 on it 
(mu client's computer) the combo box does not auto 
complete.  Entering a full number and pressing the enter key returns 
an error message "The Text entered is not an item on the 
list".  However, I can scroll down the actual list and select the item.

Has anyone come across this and have a fix?

Regards

David Emerson
Dalyn Software Ltd
Wellington, New Zealand