Create Login soap request

I am trying to create log in request to log in with successfactor through web service, i have created trail account with SF, when i hit the service using Soap UI, I am getting below exception, can someone help me what is the exact login request ?

Response:

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

   <S:Body>

      <loginResponse xmlns="urn:sfobject.sfapi.successfactors.com" xmlns:ns2="urn:fault.sfapi.successfactors.com">

         <result>

            <sessionId xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>

            <msUntilPwdExpiration xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>

            <error>

               <errorCode>FAILED_AUTHENTICATION</errorCode>

               <errorMessage>Login failure due to the invalid company!</errorMessage>

            </error>

         </result>

      </loginResponse>

   </S:Body>

</S:Envelope>

Request:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:sfobject.sfapi.successfactors.com">

   <soapenv:Header/>

   <soapenv:Body>

      <urn:login>

         <urn:credential>

            <urn:companyId>XXXtrialXXX</urn:companyId>

            <urn:username>cgrant</urn:username>

            <urn:password>XXXXXX</urn:password>

            <!--Optional:-->

         <!-- <urn:developerKey></urn:developerKey>-->

         </urn:credential>

         <!--Zero or more repetitions:-->

        <!--Zero o <urn:param>

            <urn:name>per auras</urn:name>

            <urn:value>circum claustra</urn:value>

         </urn:param>

-->

      </urn:login>

   </soapenv:Body>

</soapenv:Envelope>