401 Authentication based when connection to SSRS from Java application

Hi,

I am trying to connect my Java application with SSRS 2008 R2 .I am using the URL access method .

I get the below error from SSRS whenever an http request is sent from Java

myMachine  GET /ReportServer/Pages/ReportViewer.aspx 401

looks like SSRS is not authenticating the user.I can connect to the url from IE  my machine after giving the credentials but not when the Java app tries to connect

Is there any particular type of authentication which is required to be configured on SSRS for connecting Java.I am taking help of below article for connecting to SSRS

http://www.javaworld.com/javaworld/jw-01-2005/jw-0110-sqlrs.html

I think the Java app requires NTLM authentication.How can I achieve this with SSRS.

Thanks,