SOAP-ERROR: Encoding: object has no 'activeCharts' propertyLast response

Hi,

I could not get Report Service request for "FILTEROPTIONS" from SOAP client. I am using PHP SOAP client.

Here is my example code

<?php
ini_set('soap.wsdl_cache_enabled', 0);
ini_set('soap.wsdl_cache_ttl', 900);
ini_set('default_socket_timeout', 15);
$wsdl_reporturl = 'http://example.com/services/ReportService?wsdl';
$report = new SoapClient($wsdl_reporturl);
$webserviceAdmin = 'sam@example.com';
$webserviceAdminPassword = 'Test@123';

//report service call
function showReport() {
    $ReportServiceRequest['loginId'] = $GLOBALS['webserviceAdmin'];
    $ReportServiceRequest['password'] = $GLOBALS['webserviceAdminPassword'];
    $ReportServiceRequest['orgId'] = 1;
    $ReportServiceRequest['reportRequest'] = "FILTEROPTIONS";
    $ReportServiceRequest['reportId'] = "72136";
    $ReportServiceRequest['objectName'] = "72202";
    $response = doWebserviceReportCall($ReportServiceRequest);
    if ($response != null and strcmp($response->statusCode, 'SUCCESS') == 0)
        return true;

    return false;
}
function doWebserviceReportCall($rsr) {
    try {
        $rs = $GLOBALS['report']->remoteReportCall($rsr);
    } catch (Exception $e) {
        echo "Error! 
";
        echo $e->getMessage();
        echo 'Last response: ' . $GLOBALS['report']->__getLastResponse();
        return null;
    }
    return $rs;
}
showReport();

Can some one help me what am i missing in this code?

Thanks in advance.

Sam