How to call transaction LPCONFIG

Hi Experts,

I am trying to call a Web Service through Oracle 11g. It is a HTTP request.

when I run this line

select utl_http.request('http://ourdomain/DataServices/servlet/webservices?ver=2.1&wsdlxml',null,null,null)from dual

I get this error below.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<soapenv:Body>

<soapenv:Fault>

<faultcode>soapenv:Sender</faultcode>

<faultstring>Mandatory SOAPAction header field is missing</faultstring>

<faultactor></faultactor>

<detail/>

</soapenv:Fault>

</soapenv:Body>

</soapenv:Envelope>

Referring to the post http://scn.sap.com/people/thomas.jung/blog/2005/06/05/web-services-the-case-of-the-missing-soap-action-header

The solution is to set the SOAP Action header through LPCONFIG.

Is there anyone who can help me how to call transaction LPCONFIG?

All thoughts are useful!

Thank you!

Amy