My Mac is not going to sleep?

[Dan Eickmeier]

Hi all,
Don'tk now why my mac isn't going to sleep lately?  I've got it set to  
go to sleep when inactive for 15 minutes, and I usually close  
everthing, accept for hte finder, and leave VO On, but for some reason  
it's not going to sleep like it was before.  Is there naything that I  
could've accidentally done?