Outlook 2003 problem opening Attachments photos

[Mike6567]

I have just had a problem opening Attachment photos in my Outlook 2003.
When I double click (as I have done for the past few years) on the Attachments to see photos I get a message "Application not found".
Reverting to Outlook Express I have no problems.
I have spent an hour or so trying to sort this out without much success.
Any ideas please?
(Using XP Pro)

[Mike6567]

Panic over.
I managed to sort it by transfering a photo file from Outlook and when opening it with Microsoft Photo Editor I ticked a box that said "Always use this program when opening these files".
This seems to have got Outlook back to normal.
I think!