i get this error message Fatal error: Uncaught SoapFault exception when i try to run a php soap script

Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://localhost/testscripts/SOAP/stockserver.php' in C:\inetpub\wwwroot\testscripts\SOAP\stockclient.php:4 Stack trace: #0 C:\inetpub\wwwroot\testscripts\SOAP\stockclient.php(4): SoapClient->__construct('http://localhos...') #1 {main} thrown in C:\inetpub\wwwroot\testscripts\SOAP\stockclient.php on line 4

how do i fix it?