addpop runs fine but email isn't created

I have cPanel version 11.24.5. I am trying to add an email account via an api2 query, which seems to run fine, but when I login on cpanel the email wasn't created...

I know I'm authenticating correctly, because I can list bandwidth usage, etc. without any problems...

This is an urgent problem and any help would be greatly appreciated.

PHP:

$ip = 'dedicatedserver.com';
$root_pass = 'whmusername';
$root_user = 'whmpassword';
$account = 'clientaccount';
$xmlapi = new xmlapi($ip);
$xmlapi->set_debug(1);
$xmlapi->set_http_client('curl');
$xmlapi->password_auth($root_user,$root_pass);

$arr = $xmlapi->api2_query($account, "Email", "addpop", array(domain=>$res['domain'], email=>$email1, password=>$password1, quota=>0) );
var_dump($arr);


var_dump outputs the following:

PHP:

Array
(
    [apiversion] => 2
    [func] => addpop
    [module] => Email
)


Thanks for your help in advance