尝试实例化JBilling WSDL连接时发生错误

I'm trying to use jBilling for the first time. After installation, I tried to run the example codes in the INSTALL file attached with the php api files. I got the following error:

Fatal error: Uncaught exception 'JbillingAPIException' with message 'An error occurred attempting to instantiate the JBilling WSDL connection. Unable to parse WSDL file http:/myhost:8080/cxf/soap.service?wsdl XML error on line 1: Mismatched tag' in /library/CustomerDnsRouting/php/pcdn-themes/jbilling-php-api-v1_2/src/WSDLAPI.php:51 Stack trace: #0 /library/CustomerDnsRouting/php/pcdn-themes/jbilling-php-api-v1_2/src/JbillingAPIFactory.php(75): WSDLAPI->WSDLAPI('http://myhost:....', 'admin', '123qwe') #1 /library/CustomerDnsRouting/php/pcdn-themes/jBilling.php(8): JbillingAPIFactory::getAPI('http://myhost:....', 'admin', '123qwe') #2 {main} thrown in /library/CustomerDnsRouting/php/pcdn-themes/jbilling-php-api-v1_2/src/WSDLAPI.php on line 5

Can anyone give a solution for this?