HttpClient.execute(request) issue

Hi all
I do not know what has happened. It worked before, but suddenly I can't use my rest-script for logging into e.g. service provider catalog .

My response header looks as follows:
>> Response Headers:
    - X-com-ibm-team-repository-web-auth-msg: authrequired
    - Content-Type: text/html; charset=UTF-8
    - Content-Language: en-US
    - Set-Cookie: JazzFormAuth=Form; Path=/jazz
    - Transfer-Encoding: chunked
    - Date: Mon, 31 Mar 2014 09:38:58 GMT
    - Server: WebSphere Application Server/7.0
    - Expires: Thu, 01 Dec 1994 16:00:00 GMT
    - Cache-Control: no-cache="set-cookie, set-cookie2"

I would have expected something like this:
>> Response Header:
    - OSLC-Core-Version:  2.0
    - Content-Type:  application/rdf+xml
    - Content-Language:  en-US
    - Transfer-Encoding:  chunked
    - Date:  Mon, 31 Mar 2014 09:40:30 GMT
    - Server:  WebSphere Application Server/7.0

When debugging I see that my response status line is 200 and the header == null, thus this line
boolean loginWasRequired = doRRCOAuth(documentResponse, login, password, httpClient, jtsURI);

in my HttpUtils.java returns false.

Does any of you have any good solutions for this?