etherman posted this in another thread about broken wizards. Please try it out and hopefully it works for you.
Actually, wizard does work... Your problem comes from a problem for all classes with the new trinity, which is that trinity doesnt actually update which skills you have equipped without entirely closing demonbuddy and reopening it. Until you do, it will keep trying to cast the skills you did have equipped when it was started resulting in your little cast dance. So it doesnt really have anything to do with the spells as such, which all work... It's only that it doesnt update which spells to use. So just restart demonbuddy once you've selected the build you want to use, and you'll be fine
from this post:
http://www.thebuddyforum.com/demonbuddy-forum/151584-wizard-not-working.html