Corruption in Movie Maker when adding multiple pictures

I am trying to string together a series of pictures in Movie Maker 12 and Windows 7. The project works fine with videos and single pictures, but when I try to string several pictures together, the pictures corrupt.  I have checked and MM Compatibility is set to Windows 7.  I have created a new project for the pictures because I thought the file may have been too large. With the new project with as few as 6 pictures, I am having problems.