AFAIK it never worked liked this but always opened the contact details.
Select the contact and press CTRL+N to start a new message.
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Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
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"texan" <(E-Mail Removed)> wrote in message
news:1BEB7C89-B389-41DA-B17B-(E-Mail Removed)...
> I want to double click on a address book name and have the new message
> window
> to come up like in outlook 2003