Why doesn't this change the rate of my particle emitter?

function onTouch(part) 
	local humanoid = part.Parent:FindFirstChild("Humanoid") 
	if (humanoid ~= nil) then	
		script.Parent.CFrame = CFrame.new(-5233, 0.5, 129)
		local found = workspace["ModelWithParticleEmitter"]:FindFirstChild("Part")
		if found then
			local particle = found:FindFirstChild("ParticleEmitter")
			if particle then
				particle.Rate = 20000
			end
		end
	end 
end

script.Parent.Touched:connect(onTouch)

I can't figure out why "particle.Rate = 20000" doesn't change the rate of the particle emitter

I think on your last line you forgot to put in a (function() but I could be wrong.