Walkspeed checking and setting not working?

So I'm making an Anti-Exploit and when I use my checkHumanoid function, nothing happens. I don't know why this happens. Here's my script: getVars get's the variable, that is not needed in this, I don't think. Could be that the different script isn't being executed

function getVars()
	aWalkspeed = script.Parent.Parent.vars.allowedWalkspeed.Value
	aJumpPower = script.Parent.Parent.vars.allowedJumpPower.Value
	aMaxHealth = script.Parent.Parent.vars.allowedMaxHealth.Value
	aMaxSlopeAngle = script.Parent.Parent.vars.allowedMSA.Value
	aHipheight = script.Parent.Parent.vars.allowedHipHeight.Value
end
function checkHumanoid()
	while true do
		getVars()
	if game.Players.LocalPlayer.Character.Humanoid.WalkSpeed < aWalkspeed or game.Players.LocalPlayer.Character.Humanoid.WalkSpeed > aWalkspeed then
		game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = aWalkspeed
	end
	end
end

checkHumanoid()

Thanks in advance, iiDxpeLyfe