GUI Button reagiert nicht auf Anklicken

MuseumsraubMarker = createMarker (-1986.31, 660.42, 46.56, "corona", 2, 255, 0, 0 )
function MuseumsraubMarkerHit (player)
createMuseumGUI ()
end
addEventHandler ("onClientMarkerHit", MuseumsraubMarker, MuseumsraubMarkerHit)
MuseumGUI = {
    button = {},
    window = {},
    staticimage = {},
    label = {}
}


    function createMuseumGUI()
        MuseumGUI.window[1] = guiCreateWindow(502, 166, 585, 658, "Museumsraub", false)
        guiWindowSetSizable(MuseumGUI.window[1], false)


        MuseumGUI.staticimage[1] = guiCreateStaticImage(227, 38, 133, 127, "images\diamant.png", false, MuseumGUI.window[1])
        MuseumGUI.label[1] = guiCreateLabel(152, 175, 280, 40, "Diamant: 50.000 $ Fluchtfahrzeug: PCJ-600", false, MuseumGUI.window[1])
        guiSetFont(MuseumGUI.label[1], "clear-normal")
        MuseumGUI.staticimage[2] = guiCreateStaticImage(227, 225, 135, 136, "images\Gold.png", false, MuseumGUI.window[1])
        MuseumGUI.label[2] = guiCreateLabel(148, 371, 280, 22, "Gold: 100.000$ Fluchtfahrzeug: Securicar", false, MuseumGUI.window[1])
        guiSetFont(MuseumGUI.label[2], "clear-normal")
        MuseumGUI.staticimage[3] = guiCreateStaticImage(227, 403, 135, 132, "images\Skulptur.png", false, MuseumGUI.window[1])
        MuseumGUI.label[3] = guiCreateLabel(149, 545, 279, 22, "Skulptur: 200.000$ Fluchtfahrzeug: Flatbed", false, MuseumGUI.window[1])
        guiSetFont(MuseumGUI.label[3], "clear-normal")
        MuseumGUI.label[4] = guiCreateLabel(195, 583, 216, 35, "Klicke den Gegenstand deiner Wahl an!", false, MuseumGUI.window[1])
        MuseumGUI.button[1] = guiCreateButton(543, 33, 32, 32, "X", false, MuseumGUI.window[1])  
		showCursor (true)

    end
function gui_close
destroyElement(MuseumGUI.window[1])
end
addEventHandler("onClientGUIClick", MuseumGUI.button[1], gui_close, false)