Issues with knockback

[InactiveVan2]

So i was tryna make a knockback system, everything seems to be correct, and there isn’t any error message, Yet it still doesn’t knock the player back
ServerScript

fistm2.OnServerEvent:Connect(function()
	local chr = player.Character
	chr:SetAttribute("IsAttacking", true)
	local bloodvfx = rs:WaitForChild("BloodVfx")
	local hrp = chr.PrimaryPart
	local hitboxCFrame = chr.HumanoidRootPart.CFrame * CFrame.new(0,0,0)
	local hitboxSize = Vector3.new(10,5,20)
	local damage = 18
	local hitbox = rs.Hitbox:Clone()
	hitbox.Parent = workspace
	hitbox.CFrame = hitboxCFrame
	hitbox.Size = Vector3.new(hitboxSize, hitboxSize, hitboxSize)
	local hitcontent = workspace:GetPartBoundsInBox(hitboxCFrame, hitboxSize)
	local hitlist = {}
	
	for _,v in pairs(hitcontent) do
		if v.Parent:FindFirstChild("Humanoid") and v.Parent ~= chr and not table.find(hitlist, v.Parent) then
			table.insert(hitlist, v.Parent)
			KnockBackModule.start(v.Parent, (v.Parent:FindFirstChild("HumanoidRootPart").Position - chr.PrimaryPart).Unit * Vector3.new(60,0,60) + Vector3.new(0,40) )
			
			
			
			v.Parent.Humanoid:TakeDamage(damage)
			
			v.Parent:SetAttribute("Stunned", true)
		end
	end
	task.wait(1)
	chr:SetAttribute("IsAttacking", false)


end)

Module script

local kb = {}

kb.start = function(character, direction)
	local hrp = character:FindFirstChild("HumanoidRootPart")
	
	if hrp = nil then return end
	
	local att == Instance.new("Attachment", hrp)
	local lv = Instance.new("LinearVelocity", att)
	lv.MaxForce = 9999999
	lv.VectorVelocity = direction
	lv.Attachment0 = att
	print("this even work?")
	game.Debris:AddItem(lv, 0.1)
	
	
end

return kb

[ItsFennec (Fennec)]

Hello again! Does your print in the module script go off in the console? I don’t see where you ever require/define the module script within your fist script.

[juju_lebeIge (juju_lebelge)]

Try disabling the root (the motor6D) of the character then re enabling it right after the knockback gets dealt

[InactiveVan2]

oh it was in a dif script, dw about it now its fixed