quexs Can't connect quexs with asterisk

Hi

I have installed quexs, and working fine with limesurvey, I have too installed asterisk and asteriskNOW on 2 virtual machine, but the problem comes when I try to connect quexs with whatever asterisk, I have configured in config.inc.local.php file the right information of my asterisk server.

/**
 * Flag for VoIP with Asterisk to be enabled or not
 */
define('VOIP_ENABLED',true);

/**
 * The Asterisk server address
 */
define('VOIP_SERVER','192.168.1.173');

/**
 * The Asterisk server username for the monitor interface
 */
define('VOIP_ADMIN_USER','admin');

/**
 * The Asterisk server password for the monitor interface
 */
define('VOIP_ADMIN_PASS','a1b2');

/**
 * The Asterisk server port for the monitor interface
 */
define('VOIP_PORT','5038');

But quexs even dont see the extensions, just say VOIP disconnected and I dont know what to do.

The extensions of asterisk seems to work because I test it with zoiper, and register the extensions correctly but not quexs, Monitor interface dont give any error.

quexs is on XAMPP server and asterisk on a virtual machine on the same network.

Thanks for all the help.