sending attachment from word (using send as attachment)

If I want to send a document, say from Word or Excel, as an attachment to an email and I do it by using the send to > mail recipient (as attachment), any message that I
type in the outlook message form that opens up is not displayed to the recipient. They just receive the attachment. If I look in my sent box in outlook, the email is there but again no message is displayed in the body of the email. This is using outlook 2003 connecting to a remote exchange server which I have no access to. I've tried doing the same using outlook 2000 and a pop3 account and it works fine (the body of the email is sent).
any ideas ?

I always attach my documents manually from within Outlook rather than using the "Send as attachment" options as I have experienced problems in the past.

Sending manually from within outlook works fine as expected, when using the "send as attachment" from other machines in the office it works fine also , it just seems to be this one machine that has the problem and it's got me completely baffled!

Have you got both Outlook 2000 and 2003 installed on the same machine?

no i was using 2000 on a different machine