Please help me with this disabling trigger. I can't seem to find the mistake

I made a trigger called "You may drink another health or mana elixir" its labeled trigger_health. I mad a sub with this script:

option explicit
sub health (name, output, wildcs)
World.EnableTrigger "trigger_health", FALSE ' disable trigger
end sub

I also made an alias. called hoff. In the script field I typed health. Yet when I type in the alias it doesnt' disable the trigger. Whats wrong?

-----------------------------------------------------------
<trigger
enabled="y"
match="You may drink another health or mana elixir."
name="trigger_health"
sequence="100"
>
<send>drink health</send>
</trigger>

<alias
script="health"
match="hoff"
enabled="y"
>
</alias>

Please Reply. Thank you in advance