Unable to get the sidemenu in ionic2

Hello, I get the error as 'Cannot read property 'enable' of undefined'

My sidemenu.ts code:

import {Page,NavController,NavParams,IonicApp,MenuController} from 'ionic-angular';
    templateUrl: 'build/pages/sidemenu/sidemenu.html'
export class SideMenu {
private nav,app,menu;

constructor(public platform: Platform, nav : NavController,public navParams: NavParams,app: IonicApp,menu: MenuController){

this.app = app;

        this.menu = menu;


My sidemenu.html code:

<ion-navbar *navbar hideBackButton>
    <button menuToggle="leftMenu">
        <ion-icon name='menu'></ion-icon>
 <ion-title>Select an App</ion-title>

What could be the issue for this? Please Help.

I think you must do : this.menu.open();