Interestingly, this module script is refusing to acknowledge it's own functions?

Le module in question:

local BezierCurve = {}

function BezierCurve.Linear(Percent,P0,P1,Ins,Property)
    local t = Percent/100
    t = t >= 1 and 1 or t
    if P0 and P1 then
        if Ins and Ins[Property] then
            if Property == "CFrame" then
                local P0 = P0.p
                local P1 = P1.p
                Ins[Property] = CFrame.new(P0 + t * (P1-P0))
            else
                Ins[Property] = P0 + t * (P1-P0)
            end
        else
            return P0 + t * (P1-P0)
        end
    end
end

function BezierCurve.Quadratic(Percent,P0,P1,P2,Ins,Property)
    local t = Percent/100
    t = t >= 1 and 1 or t
    if P0 and P1 and P2 then
        if Ins and Ins[Property] then
            if Property == "CFrame" then
                local P0 = P0.p
                local P1 = P1.p
                local P2 = P2.p
                Ins[Property] = CFrame.new((1-t)^2 * P0 + 2 * (1-t) * t * P1 + t^2 * P2)
            else
                Ins[Property] = (1-t)^2 * P0 + 2 * (1-t) * t * P1 + t^2 * P2
            end
        else
            return (1-t)^2 * P0 + 2 * (1-t) * t * P1 + t^2 * P2
        end
    end
end

function BezierCurve.Cubic(Percent,P0,P1,P2,P3,Ins,Property)
    local t = Percent/100
    t = t >= 1 and 1 or t
    if P0 and P1 and P2 and P3 then
        if Ins and Ins[Property] then
            if Property == "CFrame" then
                local P0 = P0.p
                local P1 = P1.p
                local P2 = P2.p
                local P3 = P3.p
                Ins[Property] = CFrame.new((1-t)^3 * P0 + 3 * (1-t)^2 * t * P1 + 3 * (1-t) * t^2 * P2 + t^3 * P3)
            else
                Ins[Property] = (1-t)^3 * P0 + 3 * (1-t)^2 * t * P1 + 3 * (1-t) * t^2 * P2 + t^3 * P3
            end
        else
            return (1-t)^3 * P0 + 3 * (1-t)^2 * t * P1 + 3 * (1-t) * t^2 * P2 + t^3 * P3
        end
    end
end

function BezierCurve.Interp(Method,StartPercent,DesiredPercent,Duration,Callback,...)
    local Start = tick()
    local EndTime = Start + Duration
    local PercentDif =  DesiredPercent - StartPercent
    while tick() < EndTime do
        wait()
        local NewPercent = StartPercent + PercentDif * ((tick()-Start)/Duration)
        if Method == "Linear" then
            BezierCurve.Linear(NewPercent,...)
        elseif Method == "Quadratic" then
            BezierCurve.Quadratic(NewPercent,...)
        elseif Method == "Cubic" then
            BezierCurve.Cubic(NewPercent,...)
        end
    end
    if Callback then
        Callback()
    end
end
return BezierCurve

When require()'d and I attempt to use BezierCurve.Interp() from any other script, it returns the error 'Interp is not a valid member of ModuleScript'. Have I just missed something with syntax and I'm too fried to tell? Example:

BezierCurves.Interp("Quadratic", 0, 100, 2, 0, P1, P2, P3, Grenade, "CFrame")