soapui - Soap UI FailedAuthentication : The security token cannot be authenticated, WCF Client Could not establish trust relationship for the SSL/TLS s -

i connecting external webservice using wcf. have no control on external webservice. using soap ui test connection. request working fine till yesterday , security token cannot authenticated exception. per service wsdl, request needs username, pwd authentication

why seeing error on soap ui. service url. https://orserviceb2btest.oracleoutsourcing.com:443/soa-infra/services/default/mmissoaprequestreceiver!1.0*soa_d48cf4e0-5e7b-43ad-b430-727180d48841/routeeditransactions_ep

this how soap ui request looks

<soapenv:envelope xmlns:cor="http://www.caqh.org/soap/wsdl/corerule2.2.0.xsd" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">    <soapenv:header>       <wsse:security soapenv:mustunderstand="1" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">          <wsse:usernametoken wsu:id="usernametoken-25">             <wsse:username>sid</wsse:username>             <wsse:password type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#passwordtext">pwd</wsse:password>           </wsse:usernametoken>       </wsse:security>    </soapenv:header>    <soapenv:body>       <cor:coreenveloperealtimerequest>          <payloadtype>x12_270_request_005010x279a1</payloadtype>          <processingmode>realtime</processingmode>          <payloadid>339408072</payloadid>          <timestamp>2013-07-13:t23:30:29:45</timestamp>          <senderid>sid</senderid>          <receiverid>oud</receiverid>          <coreruleversion>2.2.0</coreruleversion>          <payload>input string </payload>       </cor:coreenveloperealtimerequest>    </soapenv:body> </soapenv:envelope> 

response

<env:envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">    <env:header/>    <env:body>       <env:fault xmlns:ns0="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">          <faultcode>ns0:failedauthentication</faultcode>          <faultstring>failedauthentication : security token cannot authenticated.</faultstring>          <faultactor/>       </env:fault>    </env:body> </env:envelope> 

the same request wcf client gives following error not establish trust relationship ssl/tls secure channel authority 'orserviceb2btest.oracleoutsourcing.com'.

so tried setting servercertificate

  _orclient.clientcredentials.servicecertificate.defaultcertificate = getcertificatefromstore(" *.oracleoutsourcing.com");   private static x509certificate2 getcertificatefromstore(string certname)         {              // certificate store current user.             x509store store = new x509store(storelocation.currentuser);             try             {                 store.open(openflags.readonly);                  // place certificates in x509certificate2collection object.                 x509certificate2collection certcollection = store.certificates;                 x509certificate2collection signingcert = certcollection.find(x509findtype.findbysubjectname, certname, false);                  if (signingcert.count == 0)                     return null;                 // return first certificate in collection, has right name , current.                  return signingcert[0];             }                         {                 store.close();             }          } 

this simple request working , see security token authentication problem.