I'm probably asking the painfully obvious, but have you tried the command with a character that's not an Imm? Either temporarily set your Imp to a much lower, mortal level or use a test mortal to verify if your command trigger is working.
I wondered that too, since I think that's the message I see when I accidentally have no-hassle on. I don't really have the time to type it all in manually to play with it.
I'm glad you mentioned that though because if Kay still gets messages after doing Thomas' fix, it may seem as if the fix didn't work.