SSO and Multi-site integration w/ shared user tables support

This is kind of a last resort after several days trying to get this module to work and searching the issue queue and forum threads.

I'm trying to use this module on a multi-site installation that has separate databases with shared user tables.

My client site settings.php file has the following:

$db_url = 'mysql://MyGlobalUsername:MyGlobalPassword@localhost/clientdb';

$sitedb = "clientdb";
$logindb = "controllerdb";

$db_prefix = array(
	'default'	=>	'',
	'users'		=>	$logindb.'.',
	'sessions'	=>	$logindb.'.',
	'role'		=>	$logindb.'.',
	'authmap'	=>	$logindb.'.',
	'sequences'	=>	$logindb.'.',
);

$conf['session_inc'] = 'sites/all/modules/sso/session.singlesignon.inc';
.
.
.
$cookie_domain = '.controllerdomain.com';

My controller domain site settings.php file has the following:

$db_url = 'mysql://MyGlobalUsername:MyGlobalPassword@localhost/controllerdb';
$db_prefix = '';

$conf['session_inc'] = 'sites/all/modules/sso/session.singlesignon.inc';
.
.
.
$cookie_domain = '.controllerdomain.com';

The Shared User table works find between controller and client website.

When I originally installed SSO, I had a problem with not being able to view the client site and being redirected to the controller website with a long url. This post fixed that issue though: http://drupal.org/node/606422#comment-2206222

I've tried moving the Controller settings.php file within /sites/controllerdomain.com, as well as, /sites/default/ . Flused cached, deleted SSO variables from above post link.

With this module, I'm under the understanding whether I log into either the client or controller website, I should be able to open either website into a new browser tab and be automatically logged in. Is this not the case?

Any suggestions on why this module is not working on my install?

Appreciate any input.