Problems with Form Based Authentication in Java

I want to use REST to query and update work items in RTC 2.0.0.2. I looked at some guides to get a good concept of it:
http://jazz.net/library/article/352
https://jazz.net/wiki/bin/view/Main/ResourceOrientedWorkItemAPIv2#Form_based_authentication_using

I'm trying to use the discovery chain and I can get the catalog link successfully from rootservices. But to access the catalog, I would need to be authenticated, which is where I'm stuck.

I tried following this guide for form based authentication, but I'm not having any luck. Tomcat 5 is the application server.

I outputted my cookie store and I can see that it has a JSESSIONID and JazzFormAuth.

httpClient = new DefaultHttpClient();

CookieStore cookieStore = new BasicCookieStore();

localContext = new BasicHttpContext();

localContext.setAttribute(ClientContext.COOKIE_STORE,cookieStore);

HttpGet httpGetID = new HttpGet("http://"+rtcHost+":"+rtcPort+"/jazz/authenticated/identity");

httpClient.execute(httpGetID, localContext);

httpGetID.abort();

List<NameValuePair> authFormParams = new ArrayList<NameValuePair>();

authFormParams.add(new BasicNameValuePair("j_username", rtcUsername));

authFormParams.add(new BasicNameValuePair("j_password", rtcPassword));

UrlEncodedFormEntity entity = new UrlEncodedFormEntity(authFormParams, "UTF-8");

HttpPost httpPostAuth = new HttpPost("http://"+rtcHost+":"+rtcPort+"/jazz/authenticated/j_security_check");

httpPostAuth.setEntity(entity);

httpClient.execute(httpPostAuth, localContext);

httpPostAuth.abort();



HttpGet httpget = new HttpGet("http://"+rtcHost+":"+rtcPort+"/jazz/oslc/workitems/catalog");

httpget.setHeader("Accept", "text/xml");

HttpResponse response = httpClient.execute(httpget, localContext);

httpget.abort();