Is GM:PlayerStepSoundTime broken?

[eziam1]

No matter what, this does not work.
Just to be even sure, these were my attempts.
function GM:PlayerStepSoundTime( ply, iType, bWalking )
return 100
end

//edited from player_shd
function GM:PlayerStepSoundTime( ply, iType, bWalking )
local fStepTime = 350
    local fMaxSpeed = ply:GetMaxSpeed()

    if ( iType == STEPSOUNDTIME_NORMAL || iType == STEPSOUNDTIME_WATER_FOOT ) then

        if ( fMaxSpeed <= 100 ) then
            fStepTime = 400
        elseif ( fMaxSpeed <= 300 ) then
            fStepTime = 350
        else
            fStepTime = 250
        end

    elseif ( iType == STEPSOUNDTIME_ON_LADDER ) then

        fStepTime = 450

    elseif ( iType == STEPSOUNDTIME_WATER_KNEE ) then

        fStepTime = 600

    end

    -- Step slower if crouching
    if ( ply:Crouching() ) then
        fStepTime = fStepTime + 50
    end

    return fStepTime*2
end

these were to test if these were working but, they did not change the delay between footsteps.
If these are "correct", why is it not working when I try? I even checked every lua file in the gamemode using "find all in open documents" with notepad ++ and it does not override it anywhere.