Web Services call does not work

Hello everyone,

We are trying to unpost a requisition using a web service request, we have tried different ServiceNames but got the following error for ServiceName=FindService:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">

<soap:Body>

<soap:Fault>

<faultcode>soap:Client</faultcode>

<faultstring>

NO_PART_FOUND

</faultstring>

<detail>

<WebServiceFault xmlns="http://www.taleo.com/ws/integration/toolkit/2005/07">

<code>SystemError</code>

</WebServiceFault>

</detail>

</soap:Fault>

</soap:Body>

</soap:Envelope>

Please check attachment, I have put the request in it.

Could you please suggest the correct web service request for unposting a vacancy?

Thanks in advance,

Vlad