How to Invoke http Request In report

Summary:

HI,

I am try to use in Invoke http Request in report but i am getting error

Soap invocation failure. HTTP error code: '<env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope"><env:Header/><env:Body><env:Fault><env:Code xmlns:env="http://www.w3.org/2003/05/soap-envelope"><env:Value>env:Receiver</env:Value></env:Code><env:Reason><env:Text xml:lang="en-US">Unanticipated error invoking web service null</env:Text></env:Reason><env:Detail><InvocationFault xmlns="http://oracle.bi.action.invoke.ws/" xmlns:ns0="com.siebel.analytics.web/report/v1.1"><message>Unanticipated error invoking web service null</message><status>UnknownFailure</status></InvocationFault></env:Detail></env:Fault></env:Body></env:Envelope>'.