Issues with viewing a mail.

Hi,
Ms Outlook 2000 (Small Business Edition).
The contents of a mail that I was able to read using Auto-Preview pane, disappars from the mail when I double click on it to open & read it.

Can anybody kindly help me on this issue. This happens only for one mail alone in my inbox. All other mails are OK.

Thanks in Advance.
Vijayabaskar.