/nui command not working?

[nonsequitorian]

Running alpha 6. When I type /nui, I get the "for a list of / commands, type /help" message from Bliz. Also, I have not found a nui minibutton?

What I'm trying to do is show buffs/debuffs on the HUD. So I guess I should say that the real error is that they do not show, and I can't figure out how to turn on the text for them.

Thanks!