does the slideshow not work?!!!!!

[TheCraftedGamer]

{ "images": { "title": { "image" : "texture:overlays/title_sign.png", "posX" : -10, "posY" : -15, "width" : 263, "height" : 94, "alignment" : "top_left" },

    "edition":
    {
        "image" : "custommainmenu:textures/gui/edition.png",
        "posX" : -49,
        "posY" : 67,
        "width" : 128,
        "height" : 16,
        "alignment" : "top_center"
    }
},

"buttons":
{
    "singleplayer":
    {
        "text" : "",
        "posX" : -201,
        "posY" : 38,
        "width" : 110,
        "height" : 15,
        "action" : 
        {
            "type" : "openGui",
            "gui" : "singleplayer"
        },
		"texture" : "texture:buttons/sp.png",
		"imageWidth" : 110,
		"imageHeight" : 15
    },
    
    "multiplayer":
    {
        "text" : "",
        "posX" : -200,
        "posY" : 62,
        "width" : 99,
        "height" : 15,
        "action" : 
        {
            "type" : "openGui",
            "gui" : "multiplayer"
        },
		"texture" : "texture:buttons/mp.png",
		"imageWidth" : 99,
		"imageHeight" : 15
    },
    
    "mods":
    {
        "text" : "",
        "posX" : -200,
        "posY" : 86,
        "width" : 46,
        "height" : 15,
        "action" : 
        {
            "type" : "openGui",
            "gui" : "mods"
        },
		"texture" : "texture:buttons/md.png",
		"imageWidth" : 46,
		"imageHeight" : 15
    },
        
    "options":
    {
        "text" : "",
        "posX" : -201,
        "posY" : 110,
        "width" : 66,
        "height" : 15,
        "action" : 
        {
            "type" : "openGui",
            "gui" : "options"
        },
		"texture" : "texture:buttons/op.png",
		"imageWidth" : 66,
		"imageHeight" : 15
    },
    
    "quit":
    {
        "text" : "menu.quit",
        "posX" : 2,
        "posY" : 132,
        "width" : 98,
        "height" : 20,
        "action" : 
        {
            "type" : "quit"
        }
    },
    
    "language":
    {
        "text" : "",
        "posX" : -124,
        "posY" : 132,
        "width" : 20,
        "height" : 20,
        "action" : 
        {
            "type" : "openGui",
            "gui" : "languages"
        }
    },
    
    "refresh":
    {
        "text" : "",
        "posX" : -154,
        "posY" : 132,
        "width" : 20,
        "height" : 20,
        "texture" : "custommainmenu:textures/gui/buttons.png",
        "action" : 
        {
            "type" : "refresh"
        }
    }
},


"other":
{
	"images":
    {
        "image" : "texture:static/",
		"posX" : 10,
		"posY" : 10,
		"width" : 256,
		"height" : 256,
		"slideshow" : 
			{
            "images" : ["12.png","13.png","14.png","15.png","16.png","17.png","18.png","20.png",],
            "displayDuration" : 1,
            "fadeDuration" : 1
			}
    },
	
    "background":
    {
        "image" : "texture:background/431.png",
		"mode" : "fill"
		
    }
}

}