Thunderbird won't Display jpg pictures

[Jim]

If I get a .jpg picture in a email Thunderbird 2.0.0.16 won't open 
pictures, Even after I tell it to "Open Images".
But if I go to attachments at bottom of email and click on attachments 
it will open the pictures in a different window.
In /Edit/Preferences/Attachments/Download Actions/View and Edit Actions, 
there is nothing in that window, should there
 be ?