Soap error 'Bad envelope tag' in response

Hi All,

We are integrating SAP sytem with Lotus notes using PI. I am using SOAP adapter for webservices hosted by LN team. it is a RFC -> PI -> SOAP synchronous . When a request is sent from SAP it is hitting the webservice but we are getting the response as below (this is the message from moni)

xml version="1.0" encoding="UTF-8" ?>  -<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:Fault>

</soapenv:Body>

</soapenv:Envelope>

The soap reciever channel is showing success in Adapter engine...

Please let me know what needs to be done

Note: 1) I am getting proper response when tried in SOAP UI.

          2) In SOAP receiver channel i have checked the 'Do not use SOAP envelope'

Thanks,

sagarika