Heroku and mongoHQ: Connection failed
===

I have the following environment variable on Heroku :

    MONGOHQ_URL: mongodb://heroku:password%40mongohq%2Estaff%2Ecom:10056/app6186345

Originally the error was :
 

    Database name cannot contain '.'

I escaped '.' and '@'and I still have the same result, a connection failed but with the message :

    [Error: failed to connect to [heroku:27017]]

What am I doing wrong? 

When I checked the documentation about mongoHQ, nothing is said about escaping caracters or something equivalent.

