Currently Being ModeratedMar 2, 2013 9:05 AM (in response to katiedigiulio)
You are doing it right, so it should work. Quit iPhoto and restart it. See if it works better after a restart.
Currently Being ModeratedMar 2, 2013 4:37 PM (in response to katiedigiulio)
Make sure you're not trying to drag the photos into a folder in the left hand pane rather than an album.
Next launch iPhoto with the Option key held down and create a new, test library. Import some photos and test to see if the same problem persists.