cannot find module '@angular/http'? -

i added following property systemjs.config.js map object in angular 2 app:

'@angular/http': 'https://npmcdn.com/@angular/http' 

when ctrl-click on url attempts download js file. however, when try import '@angular/http' @ top of service.ts, compiler returns error "cannot find module '@angular/http'.`"

is there additional step i'm missing in order module recognized , usable angular app? i'm using angular version 2.0.0-rc.4.

cdn path - https://npmcdn.com/@angular/http@2.0.0-rc.4/

by default, systemjs.config.js looks index.js in path.

refer plunker example - https://angular.io/resources/live-examples/quickstart/ts/plnkr.html

also, make sure while importing use below syntax-

import { http } '@angular/http'; 

see if helps.