Keep on getting HTTP401 when trying to access my Sanbox-RM-Project with OSLC/Lyo2

Hi,

I just created a Sandboxproject for RequirementsManagement and tried to retrieve a Sample Requirement:

https://jazz.net/sandbox02-rm/resources/_OnKPAZr4EeOKJfCEQZYPEg

in Java using the Lyo2-Library. However, I keep on getting HTTP 401. Can you tell me please, what is the right way to authenticate?

[code]
OslcClient client = new OslcClient();
        final String USERNAME = "XXX";
        final String PASSWORD = "XXX";
        final String RM_JAZZ = "https://jazz.net/sandbox02-rm/resources/_OnKPAZr4EeOKJfCEQZYPEg";
        UsernamePasswordCredentials upc = new UsernamePasswordCredentials(USERNAME, PASSWORD);
        DefaultHttpClient httpClient = (DefaultHttpClient)client.getHttpClient();
        httpClient.getCredentialsProvider().setCredentials(AuthScope.ANY, upc);
        try {
            ClientResponse resource;
            resource = client.getResource(RM_JAZZ, MediaType.APPLICATION_XML); // <-- iS HTTP401
[/code]

thanks in advance
David