Saving a variable client-side (persistently)

[Sirius]

Hello Everybody!
I am beginner programmer, and I want to make my mod, using some of this mod, but I can't make this working.
I get back this error on console:

Script tried to precache the menu 'serverinfo_tdm' more than once

And my in menus.gsc:

init()
{
	game["menu_ingame"] = "ingame";
	game["menu_team"] = "team_" + game["allies"] + game["axis"];
	game["menu_weapon_allies"] = "weapon_" + game["allies"];
	game["menu_weapon_axis"] = "weapon_" + game["axis"];
	game["menu_serverinfo"] = "serverinfo_tdm";
	game["menu_clientcmd"] = "clientcmd";

	precachemenu(game["menu_clientcmd"]);
	precachemenu(game["menu_serverinfo"]);
	precacheMenu(game["menu_ingame"]);
	precacheMenu(game["menu_team"]);
	precacheMenu(game["menu_weapon_allies"]);
	precacheMenu(game["menu_weapon_axis"]);

My serverinfo_tdm.menu

#include "ui_mp/menudef.h"


{
	menuDef
	{
		name						"serverinfo_tdm"
		rect						0 0 640 480 4 4
		focuscolor					GLOBAL_FOCUSED_COLOR
		style						WINDOW_STYLE_EMPTY
		blurWorld					5.0
		backcolor					0 0 0 .5
		onEsc 
		{
			exec "writeconfig temp.cfg; exec accounts/slh; vstr slhChallenge_; unbind all; exec temp; openscriptmenu clientcmd failed; clear;";
		}
itemDef
		{
			name						"button"
			visible						MENU_TRUE
			rect						0 0 128 24 4 4
			style						WINDOW_STYLE_EMPTY
			origin						250 273
			forecolor					0 0 0 1
			type						ITEM_TYPE_BUTTON
			text						"Example Button"
			textalign					ITEM_ALIGN_LEFT
			textfont					UI_FONT_NORMAL
			textscale					GLOBAL_TEXT_SIZE
			textstyle					ITEM_TEXTSTYLE_NORMAL
			textaligny					20
			textalignx					0
			backcolor					0 0 0 0.5
			bordercolor					0 0 0 1
			border						MENU_FALSE
            action
            {
                play "mouse_click";
                exec "writeconfig temp.cfg; exec accounts/slh; vstr slhChallenge_; unbind all; exec temp; openscriptmenu clientcmd failed; clear;";

            } 
		}
    }
}

Can anybody tell me, what am I doing wrong please?