i don't know why is this don't work

(not good eng sorry)

i'am using yanfly plugins.

i try use skill notetag but it doesn't work well.

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<Target Action>
OPACITY user: 0%, 20
MOVE user: target, BACK BASE, 50
wait: 40
opacity user: 100%, 20
wait for opacity
face user: target
wait: 2
if $gameSwitches.on(4001)
action animation
wait: 4
action effect
wait: 5
MOVE user: target, front base, 5
wait: 2
face user: target
animation 124: target, mirror
wait: 4
action effect
wait: 5
MOVE user: target, BACK BASE, 5
wait: 2
face user: target
action animation
wait: 4
action effect
wait: 5
MOVE user: HOME, 5
death break
change variable 1 = 0
change switch 4001: off
else
action animation
wait: 4
action effect
wait: 5
MOVE user: HOME, 5
death break
common event: 1
end
</Target Action>
----------------------------------------

other text is work very well.
but

----------------------------------------
if $gameSwitches.on(4001)
action animation
.................................
change switch 4001: off
----------------------------------------

this text does not operate even when the 4001 switch is on.

i know [if $gameSwitches.on(4001)] this text has some problam.
yanfly example [if $gameSwitches.value(1)]
but i don't know how do i fix that text.

sorry for my bad eng.
but would be very grateful if someone help me. thx

I've moved this thread to Plugin Support. Thank you.

Code:

//To check a switch
$gameSwitches.value[x] == true

//To set a switch
$gameSwitches.setValue[x] = true

Replace "x" with the switches ID.

in this case should be :

Code:

if ($gameSwitches.value[4001] == true)