Featured Images Not Showing on Daily Theme

When I add a featured image to a blog post, it does not always show up on the home page slide show, or the wall, or the side bar areas -

I would say it works less than half the time - I have deleted posts, then recreated them with a featured image that worked on other posts, but it does not still work either way, I just get the symbol for a missing image (the circle with a slash in it) -

How can I make sure that a featured Image will show when it is supposed to ?