Any ideas about iPhoto and getting the photos onto the desktop or onto my email?

Under the “share” dropdown menu is the command (not grayed) to “set desktop.” Nothing happens when I click on it. Nor does anything happen when I use the “email” or “set desktop” icons at the bottom right of the iPhoto page. I can still import to Flickr by the same method. Any suggestions? I can call Apple support if really necessary.