Typescript 错误：未捕获(promise)：错误：无法匹配任何路由Angular 2

##错误

After Click Product it shows this

##主代码.ts

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { APP_ROUTER_PROVIDERS } from '../app/app.routes';
import { AppComponent } from '../app/app.component';

bootstrap(AppComponent, [APP_ROUTER_PROVIDERS]);

##应用程序.组成部分

import { Component } from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';

@Component({
  selector: 'demo-app',
  template: `

    <div class="outer-outlet">
      <router-outlet></router-outlet>
    </div>
  `,
  directives: [ROUTER_DIRECTIVES]
})
export class AppComponent { }

##应用程序.路由

import { provideRouter, RouterConfig } from '@angular/router';

import { AboutComponent, AboutHomeComponent, AboutItemComponent } from '../app/about.component';
import { HomeComponent } from '../app/home.component';

export const routes: RouterConfig = [
  { 
    path: '', 
    component: HomeComponent
   },
  {
    path: 'admin',
    component: AboutComponent,
    children: [
      { 
        path: '', 
        component: AboutHomeComponent
       },
      { 
        path: '/product', 
        component: AboutItemComponent 
      }
    ]
  }
];

export const APP_ROUTER_PROVIDERS = [
  provideRouter(routes)
];

##回家.组成部分

import { Component } from '@angular/core';

@Component({
  selector: 'app-home',
  templateUrl:'../app/layouts/login.html'
})
export class HomeComponent { }

##大约.组成部分

import { Component } from '@angular/core';
import { ActivatedRoute, ROUTER_DIRECTIVES } from '@angular/router';

@Component({
  selector: 'about-home',
  template: `<h3>user</h3>`
})
export class AboutHomeComponent { }

@Component({
  selector: 'about-item',
  template: `<h3>product</h3>`
})
export class AboutItemComponent { }

@Component({
    selector: 'app-about',
    templateUrl: '../app/layouts/admin.html',
    directives: [ROUTER_DIRECTIVES]
})
export class AboutComponent { }