Password Authentication Problem for JAXR Connection

Hi All,
I registered with IBM UDDI test registry with user name and password and tried to connect to it using a servlet with the following code:
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javax.naming.InitialContext jndiEnc=new javax.naming.InitialContext();
ConnectionFactory factory= (ConnectionFactory) jndiEnc.lookup("java:comp/env/eis/JAXR");
Connection connection=factory.createConnection();

PasswordAuthentication credential = new PasswordAuthentication(userName, password.toCharArray());
Set credentials = new HashSet();
credentials.add(credential);
connection.setCredentials(credentials);
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I could get the connection but while setting the credential I got the following error:
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com.sun.xml.messaging.saaj.SOAPExceptionImpl: java.security.PrivilegedActionException: com.sun.xml.messaging.saaj.SOAPExceptionImpl: Message send failed
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at line "connection.setCredentials(credentials)
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I gave the same user-id and password that I gave for UDDI test registry . Can any one guide me.I am not sure whether the attributes I set for the JAXR Resource Adapter are correct. I used the following:
---
AuthMethod: UDDI_GET_AUTHTOKEN
HttpsProxyPort:8181
HttpProxyPort:8080
HttpProxyHost:localhost
HttpsProxyHost:localhost
LifeCycleManagerURL:https://uddi.ibm.com/testregistry/publishapi
QueryManagerURL:http://uddi.ibm.com/testregistry/inquiryapi
---
I would really appreciate if any one could provide some hints,
Thanks in advance
Prasad