[SOLVED] Customer Portal login

Hi everybody,
I just installed a fresh version of VTECRM Free 4.5 on Ubuntu 14.04 and PHP 5.5.9, located into subdomain.mydomain.com/crm
Everything works fine but I can't login into cusotmer portal at subdomain.mydomain.com/crm/portal with the error "Could not connect to server. Please contact the administrator."

These are my settings:
PortalConfig.php:
global $Server_Path;
global $Portal_Path;

$Server_Path = "";

$Authenticate_Path = "";

include('../config.inc.php');
global $site_URL;
if ($site_URL)
$Server_Path = $site_URL;
global $PORTAL_URL;
if ($PORTAL_URL)
$Authenticate_Path = $PORTAL_URL;

---

config.inc.php:

$PORTAL_URL = ' subdomain.domain.com.com/crm/portal ';

// without final "/"
$site_URL = ' subdomain.domain.com/crm ';

// root directory path (with final "/")
$root_directory = '/var/www/html/crm/';

---

I searched for the solution but what I found doesn't resolve my problem.
Please, can anyone help me?
Thank you very much,
KR

Hi dende,
do you think that downgrading php could solve my problem?
Are my settings correct?

Hi dende,
just to notify you that downgrading php to 5.3 (as your hint) solved my problem.
Thank you again for your support.
Regards,

Marco