Why Didn't They Do Fooling Yourself/Crystal Ball?

During the edge tour that is. Although all I can say for glen's versions of tommy's songs is yak, I would've like to heard them do those two. Just curious as to why they didn't.
http://www.forums.melodicrock.com/phpBB/
http://www.forums.melodicrock.com/phpBB/viewtopic.php?f=61&t=28821
Thenightbull wrote:During the edge tour that is. Although all I can say for glen's versions of tommy's songs is yak, I would've like to heard them do those two. Just curious as to why they didn't.