Please show us some script. Also the driver from Microsoft is not compatible with PHP's mssql drivers. They use differenet APIs.

function datamssql(){
	
	if(!$mssqldb){	
	global $mssql_host, $mssql_user, $mssql_password, $mssql_database;

	$mssqldb = new Zend_Db_Adapter_Pdo_Mssql(array(
    'host'     => $mssql_host,
    'username' => $mssql_user,
    'password' => $mssql_password,
    'dbname'   => $mssql_database
	));
	}

	return $mssqldb;
	} // end mssql connection


Fatal error: Uncaught exception 'Zend_Db_Adapter_Exception' with message 'The mssql driver is not currently installed' in C:\wamp\virtualhost\pchousecms\cmsadmin\include\Zend\Db\Adapter\Pdo\Abstract.php:103 Stack trace: #0 C:\wamp\virtualhost\pchousecms\cmsadmin\include\Zend\Db\Adapter\Pdo\Mssql.php(135): Zend_Db_Adapter_Pdo_Abstract->_connect() #1 C:\wamp\virtualhost\pchousecms\cmsadmin\include\Zend\Db\Adapter\Abstract.php(389): Zend_Db_Adapter_Pdo_Mssql->_connect() #2 C:\wamp\virtualhost\pchousecms\cmsadmin\include\Zend\Db\Adapter\Pdo\Abstract.php(205): Zend_Db_Adapter_Abstract->query('SELECT COUNT(no...', Array) #3 C:\wamp\virtualhost\pchousecms\cmsadmin\include\connector\backoffice\wintouch\subfamilia.class.php(351): Zend_Db_Adapter_Pdo_Abstract->query('SELECT COUNT(no...') #4 C:\wamp\virtualhost\pchousecms\cmsadmin\include\connector\subfamilia\subfamilia.php(16): subfamilia->countrec() #5 {main} thrown in C:\wamp\virtualhost\pchousecms\cmsadmin\include\Zend\Db\Adapter\Pdo\Abstract.php on line 103

I also had copy the ntwdblib.dll as i did in on PHP 5.2.6 to work, but doesn?t work

Well, the error is clear. You did not install the mssql driver. But as we are not Zend and has little to do with the Zend framework, I would suggest to ask for some support there instead.

Not a php bug > bogus.

Ok. Thanks, it was the php_pdo_mysql that was not loaded, only php_mssql was loaded.
Now is working.