Board Thread:Tapped Out Help/@comment-69.242.120.129-20130730022236/@comment-33813742-20130730030020

Sometimes it is tricky to tap Homer. You need to tap him 10 times in quick succession in order for it to happen. These taps have to occur whilst you have him selected (the job menu is open).

If it still isn't working, check your inventory for the statue. Maybe you've already gotten it and you haven't noticed?