Renata,
boa tarde.
Veja se alguma das soluções abaixo resolve:
http://social.technet.microsoft.com/Forums/pt-BR/exc2003pt/thread/c164ec3a-87f5-4096-885b-dd5ac83da7bf
http://social.technet.microsoft.com/forums/pt-br/exc2003pt/thread/017783FA-DEC1-412C-88B1-EF84F91FA9F2
http://social.technet.microsoft.com/Forums/pt-BR/exc2003pt/thread/e38c3e11-0bf3-49eb-b795-51f0e6598876/
http://social.technet.microsoft.com/forums/pt-br/exc2003pt/thread/69A2ACBD-A892-429B-BA10-5D4E784392D1
http://social.technet.microsoft.com/Forums/pt-BR/exc2003pt/thread/11799b5c-8a06-4ce7-a177-6456d93b24eb
http://social.technet.microsoft.com/Forums/pt-BR/exc2003pt/thread/3e9dccf8-0931-4de1-adf1-bd572f203d51
http://social.technet.microsoft.com/forums/pt-br/exc2003pt/thread/208A76A1-3306-42B5-8FAC-8A6B2BC993AB
http://social.technet.microsoft.com/Forums/pt-BR/exc2007pt/thread/b86a40fb-59bb-4e55-ba48-e6bc79bbe3a5