SWEP animation doesn't work

[Tardpipl]

SWEP animation doesn't work. Why and how to fix it?
AddCSLuaFile()

SWEP.Author                    = "MS-DOS"
SWEP.Base                    = "weapon_gfists"
SWEP.PrintName                = "Fists"
SWEP.Instructions            = [[Left-Click: to eat]]

SWEP.ViewModel                 = Model( "models/weapons/c_arms.mdl" )
SWEP.ViewModelFlip            = false
SWEP.UseHands                = true
SWEP.WorldModel                 = ""
SWEP.SetHoldType            = "fist"

SWEP.Weight                    = 5
SWEP.AutoSwitch                = true
SWEP.AutoSwitchFrom            = false

SWEP.Slot                    = 0
SWEP.SlowPos                = 4

SWEP.DrawAmmo                = false
SWEP.DrawCrosshair            = false

SWEP.Spawnable                = false
SWEP.AdminSpawnable            = true

SWEP.Primary.ClipSize         = -1
SWEP.Primary.DefaultClip     = -1
SWEP.Primary.Automatic         = true
SWEP.Primary.Ammo             = "none"

SWEP.Secondary.ClipSize        = -1
SWEP.Secondary.DefaultClip     = -1
SWEP.Secondary.Automatic     = true
SWEP.Secondary.Ammo         = "none"
SWEP.DrawAmmo                = false

SWEP.HitDistance             = 48

SWEP.ShouldDropOnDie        = true

local SwingSound = Sound("Weapon_Crowbar.Single")
local HitSound = Sound("Weapon_Crowbar.Melee_Hit")

function SWEP:Initialize()
    self:SetHoldType( "fist" )
end

function SWEP:PrimaryAttack()
    if (CLIENT) then return end
    local ply = self:GetOwner()
    ply:LagCompensation (true)
    local shootpos = ply:GetShootPos()
    local endshootpos = shootpos + ply:GetAimVector() * 70
    local tmin = Vector(1,1,1) * -10
    local tmax = Vector(1,1,1) * 10

    local tr = util.TraceHull({
        start = shootpos,
        endpos = endshootpos,
        filter = ply,
        mask = MASK_SHOT_HULL,
        mins = tmax
    })

    if(not IsValid(tr.Entity)) then
        tr = util.TraceLine({
        start = shootpos,
        endpos = endshootpos,
        filter = ply,
        mask = MASK_SHOT_HULL
        })
    end
    local ent = tr.Entity

    if (IsValid(ent) && (ent:IsPlayer() || ent:IsNPC())) then
        self.Weapon:SendWeaponAnim(ACT_GESTURE_FLINCH_LEFTARM)
        ply:SetAnimation(PLAYER_ATTACK1)
        ply:EmitSound(HitSound)
        ent:SetHealth(ent:Health() - 5)
        if (ent:Health()<1) then
            ent:Kill()
        end

        ply:SetHealth(math.Clamp(ply:Health() + 5))
    elseif (!IsValid(ent)) then
        self.Weapon:SendWeaponAnim(ACT_GESTURE_FLINCH_LEFTARM)
        ply:SetAnimation(PLAYER_ATTACK1)
        ply:EmitSound(SwingSound)
    end    
    self:SetNextPrimaryFire(CurTime() + self:SequenceDuration() + 0.1)
    ply:LagCompensation (false)
end

function SWEP:OnDrop()

    self:Remove() -- You can't drop fists

end

function SWEP:Deploy()
    local speed = GetConVarNumber( "sv_defaultdeployspeed" )

    local vm = self.Owner:GetViewModel()
    vm:SendViewModelMatchingSequence( vm:LookupSequence( "fists_draw" ) )
    vm:SetPlaybackRate( speed )

    self:SetNextPrimaryFire( CurTime() + vm:SequenceDuration() / speed )
    self:SetNextSecondaryFire( CurTime() + vm:SequenceDuration() / speed )

    return true
end

function SWEP:CanSecondaryAttack()
    return false
end

[LoweChaser]

Duplicated thread ;)
-- When you are doing
SWEP.SetHoldType = "fist"
-- ...
function SWEP:Initialize()
self:SetHoldType( "fist" ) -- This won't do anything, because you set SWEP.SetHoldType to string, not function
end
I think it should work if you remove SWEP.SetHoldType = "fist"

[Tardpipl]

No. It doesn't work

[WasabiThumbs]

You are using a function value like a variable, and it makes me cringe.
SWEP.SetHoldType = "fist"
SWEP Structure