Some Thunderbird attachments don't start application

[Antonio M]

I am running F11 fully updated on this box,
thunderbird-3.0-3.fc11.i586, openoffice.org-3.1.1-19.8

When I receive an attachment, if it is *.odt Openoffice is started, if
it is *.doc I have only the option to save it...
Both files start openoffice from nautilus.

What shall I do to have the correct behaviour??? Tnx

-- 
Antonio Montagnani
Skype : antoniomontag
SIP: antoniomontag at ekiga.net