Lever puzzle

[Endrek03]

AddDebugMessage is your friend here. Use it to check if the combototal count works and if it does, check the comboright variable. It's quite an advanced thing to script, there aren't many here that could do this, myself included

Don't mean to be the complete new guy, but -- How exactly does the AddDebugMessage work?
I tried sticking it in OnStart as:
AddDebugMessage("combolever", true);
which I assumed would make the debug message come up for the syntax "Combolever", but no such luck.