Why can't I send a string value to the server with remote event?

This is part of a fighting Local Script (First Script), this part use a Remote Event to let a Server Script (Second Script) make damage and these thing.

The problem is that when I send RightHand and I print it in the Server Script it is nil.

Something to add is that in Local Script when I print ye it doesn't print it.

local Hit = function(hand, hit)

    if hand == "RightHand" then

        if canHit.RightHand == true then

            canHit.RightHand = false

            pcall(function()

                if hit.Parent.Humanoid then

                    script.Hit:FireServer(hit, false, "RightHand")

                    print("ye")

                end

            end)

        end

    elseif hand == "LeftHand" then

        if canHit.LeftHand == true then

            canHit.LeftHand = false

            pcall(function()

                if hit.Parent.Humanoid then

                    script.Hit:FireServer(hit, false, "LeftHand")

                    print("ye2")

                end

            end)

        end

    elseif hand == "RightLeg" then

        if canHit.RightLeg == true then

            canHit.RightLeg = false

            pcall(function()

                if hit.Parent.Humanoid then

                    script.Hit:FireServer(hit, false, "RightLeg")

                    print("ye3")

                end

            end)

        end

    elseif hand == "LeftLeg" then

        if canHit.LeftLeg == true then

            canHit.LeftLeg = false

            pcall(function()

                if hit.Parent.Humanoid then

                    script.Hit:FireServer(hit, true, "LeftLeg")

                    print("ye4")

                end

            end)

        end

    end

end

This is part of the Server Script and when I print AnimationType, it prints nil

script.Parent.OnServerEvent:Connect(function(plr, hit, knockBack, AnimationType)

    isProtecting = hit.Parent.MainAbilities:GetAttribute("IsProtecting")

    print(hit)

    print(knockBack)

    print(AnimationType)

    if AnimationType == "RightHand" then

        hitAnimLoaded = hit.Parent.Humanoid:LoadAnimation(hitAnim.FrontRight)

        if isProtecting == false then

            hitAnimLoaded:Play()

        end

    end