I can double click any attachment type in a mail excepted message object. It
is not responded either double click or right click and select "open".

You mean msg-files?
There is an issue with the latest Google Desktop which causes this behavior.
Uninstall it and try again.

--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
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http://www.msoutlook.info/
Real World Questions, Real World Answers

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"www" <(E-Mail Removed)> wrote in message
news:B2E0B25B-B553-45F1-851C-(E-Mail Removed)...
> I can double click any attachment type in a mail excepted message object.
> It
> is not responded either double click or right click and select "open".