angular2无法相对于父路线导航

测试导航相对遇到的问题：

路由配置：

{
    path: '',component: CheckCompanyComponent,children:[
      {
        path:'',loadChildren: 'app/components/company/check-company-home/check-company-home.module#CheckCompanyHomeModule'
      },{
        path:':id',loadChildren: 'app/components/company/check-company-detail/check-company-detail.module#CheckCompanyDetailModule'
      }
    ]
  }

在check-company-home组件中

goIdPage(){
    this.router.navigate(['22'],{ relativeTo: this.route });
  }

can navigate from “/company” to “/company/22”

在check-company-detail组件中：

goBack(){
    this.router.navigate(['../'],{ relativeTo: this.route });
  }

But can’t navigate form “/company/22” to “/company”,

为什么？