GUI script works in v6 but not v5?

[skillmaster19]

I made a GUI script that sets the players gani if they click a button, and to my suprise the buttons work in v6 but not v5. Can anyone explain why/ how to fix it? here is the code:

NPC Code:

---

// Scripted by skill

//#CLIENTSIDE

function onWeaponFired() {

gestureswindow.show();

new GuiWindowCtrl("gestureswindow")

{

  profile = GuiBlueWindowProfile;

  extent = {310,500};

  position = {5, 5};

  text = "Gestures";



  new GuiButtonCtrl("gesturegrab")

  {

    profile = GuiBlueButtonProfile;

    extent = {100, 25};

    position = {105,25};

    text = "grab";

}

new GuiButtonCtrl("gesturewalk")

  {

    profile = GuiBlueButtonProfile;

    extent = {100, 25};

    position = {5,25};

    text = "walk";

}

new GuiButtonCtrl("gesturesit")

{

profile = GuiBlueButtonProfile;

    extent = {100, 25};

    position = {205,25};

    text = "sit";

}

}

}

function gesturegrab.onAction()

{

  player.ani = "grab";

}

function gesturewalk.onAction()

{

player.ani= "walk";

}

function  gesturesit.onAction()

{

player.ani= "sit";

}

---