My Lua Problem

function waterEffects( ply, ent )
    local waterdmg = DamageInfo()
    waterdmg:SetAttacker(nil)
    waterdmg:SetInflictor(nil)
    waterdmg:SetDamage( math.random(0.5,5) ) --A random number bettween 5 and 10
    waterdmg:SetDamageType( DMG_DROWN ) --Water damage

    for k, ply in pairs(player.GetAll()) do
        if ( ply:IsValid() and ply:WaterLevel() >= 3 ) then
            print(ply:Name().." Is under water!")
            timer.Create( "uwater_time", 25, 0, function()
                print(ply:Name().." Needs Air!")
                ply:TakeDamageInfo( waterdmg )
                util.ScreenShake( ply:GetPos(), 5 ,5 ,1.5 ,100 )
                timer.Stop( "uwater_time" )
            end)
            timer.Start( "uwater_time" )
        else
            timer.Stop( "uwater_time" )
        end
    end
end

hook.Add( "Think", "RealisticWaterEffects", waterEffects )

function classControl()

    defaultTools = { "weapon_toolgun", "camera", "weapon_physgun", "weapon_gravgun"  }

    for k, ply in pairs(player.GetAll()) do
        if ( ply:IsSuperAdmin() == false ) then
            if ( ply:Team() == TEAM_PET ) then
                if ( ply:GetActiveWeapon():GetClass() != "weapon_pounce" or ply:GetActiveWeapon():GetClass() != "weapon_bite" ) then
                    if ( table.HasValue( defaultTools, ply:GetActiveWeapon():GetClass() ) ) then ply:GetActiveWeapon():Remove() else ply:DropWeapon( ply:GetActiveWeapon():GetClass() ) end
                end
            end
        end

        if ( ply:Team() == TEAM_CPPET ) then
            ply:SetMaterial("models/combine_soldier/combinesoldiersheet")
        else
            ply:SetMaterial("")
        end

        local tmb = 7

        if ( ply:Team() == TEAM_PET or ply:Team() == TEAM_CPPET ) then
            print(ply:Name().." Is A Pet!")
            timer.Create( "pet_health_time", 7, 0, function()
                print(ply:Name().." +1")
                ply:SetHealth(ply:Health() + 1)
                timer.Stop( "pet_health_time" )
            end)
            timer.Start( "pet_health_time" )
        else
            timer.Stop( "pet_health_time" )
        end
    end

end

hook.Add( "Think", "PlayerClassControl", classControl )