HMVC database error

[eluser]jahsen[/eluser]
I installed HMVC but i recently got an error:

A PHP Error was encountered
Severity: Notice
Message: Undefined property: News::$db
Filename: libraries/Session.php
Line Number: 201
Fatal error: Call to a member function where() on a non-object in ...\system\libraries\Session.php on line 201

Codeigniter version is 2.1.1, and HMVC is the latest version. I folowed the
instalation in bitbucket wiki and now i am trying to run a empty method from another Controller.
Ex.:

echo Modules::run('news/news/test_data');

Thank You.