Mantis SOAP APi

Hi
I have a problem with Mantis SOAP API
I get access denided when I try to call

    $client = new SoapClient('
http://clxrnd.clxeurope.com:8080/mantisbt/api/soap/mantisconnect.php?wsdl',
             array(
        'trace' => 1,
        'exceptions' => true,
        'cache_wsdl' => WSDL_CACHE_NONE,
        'features' => SOAP_SINGLE_ELEMENT_ARRAYS, ));

    $issue = array('project'=>'test','summary'=>'questa isssue è stata
inserita tramitte soap api',
            'description'=>'descriuzione isssue fa fa fa fa');

    $client->mc_issue_add( array(
'username'=>'alban','password'=>'alban',$issue)  );

I cannot understand where is the error?

Can help any one please? Is there any documentation on API?

-- 
www.albanx.com

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