Tank Alert

I can't seem to get it working, idk what is wrong, i've tried pretty much every command, I could get the /ta test to work correctly and /ta lock since I moved the box that shows the alerts... but I couldn't get it to turn on or alert me of anything..

Thanks for making the mod, I play my Rogue most often, but have it running so I know if my healers get aggro. If so I head over and tear the mob a new one to pull it off them. At least then they can heal me, rather than themselves, and I'm likely a better match for the mob than a softee..