ROBLOX Default Animations Interupts My Animation?

I set the AnimationTrack priority to action, but the ROBLOX animation still over rides it. (only works for the client, not for other players)

Filtering Enabled is on.

local Animation = script:WaitForChild('Animation')
local AnimationTrack = nil 
local ActiveTracks = nil 

local State = nil 

function AF_LOADANIM(name, id, speed, state)
    Animation.AnimationId = id
    State = state

    if AnimationTrack then 
        AnimationTrack = nil 
    end

    --SET TRACK--
    AnimationTrack = Humanoid:LoadAnimation(Animation)

    AnimationTrack.Name = name
    AnimationTrack.Priority = Enum.AnimationPriority.Action
    print(AnimationTrack.Priority)

    --PLAY--
    AnimationTrack:Play()

    --ADJUST SPEED--
    AnimationTrack:AdjustSpeed(speed)
end