fault string: No Credential

Hi All,

i have literally just started using SOAPUI to try and add a comment to a requisition. All seemed to going OK but when i clicked to send the message the response i got back was as follows...does anyone know what the below fault message is referring to...it looks like a credential issue, but I am trying to understand how i can resolve it?

I'd be really grateful for any feedback...

Thx,
Tariq


<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soap:Body>
<soap:Fault>
<faultcode>soap:Client</faultcode>
<faultstring>No Credential</faultstring>
<detail>
<WebServiceFault xmlns="http://www.taleo.com/ws/integration/toolkit/2005/07">
<code>Sender</code>
</WebServiceFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>