I try deploy my app Node.js + MongoDB.

1. I deployed my app on Heroku. [Added add-ons Mongolab to app](http://i.stack.imgur.com/Pqh0p.png).
2. Opened my data base and create new user name: dima; password: \*\*\* (Add database user).
3. Then I try to connect to the DB:

My console: 

mongo ds039135.mongolab.com:39135/heroku\_xkbthxdx -u dima -p \*\*\*

MongoDB shell version: 2.4.9

connecting to: ds039135.mongolab.com:39135/heroku\_xkbthxdx

Fri Feb 19 19:26:50.181 Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:228

exception: login failed

What is missing in this? Thanks!