This may be part of why it doesn't work. In google earth, there is a checkbox window at the bottom left side. Find the checkbox labeled "3D Buildings" and check it. Then click on the little arrow beside it to open up a list of cities that have the 3d buildings mapped. This doesn't fix it, but it may be needed for it to work. :

"Walk down the right back alley in Sin City, and you can find anything."