Post request by Java code for Rails application

Hi, i am trying to call my Rails app using Java code using Jersey

I m having 2 tables .

Blogposts (id,name,slug,desc) Comments (id,data,node_id,node_type)

I m trying to post a comment through my ruby code.

The Url for me is like
http://localhost:3000/api/blogs/comment.xml?slug=blogtitle-0&comment=aaaaaaaaaaaaaaa

The one is tried is
blogBean = objBlogWrapper.postComment(slug,comment);

public BlogBean postComment(String slug, String comment) {
    System.out.println(slug+""+comment);
    // Create a multivalued map to store the parameters to be send in
the REST call
    MultivaluedMap<String, String> newBlogParam = new
MultivaluedMapImpl();
    // newBlogParam.add("blogpost[slug]", slug);
    // newBlogParam.add("comment[data]", comment);
    newBlogParam.add("slug", slug);
    newBlogParam.add("comment", comment);

    BlogBean blogBean = null;
    try {
        blogBean =
webResource.path(ConfigurationUtil.POST_COMMENT).header(ConfigurationUtil.AUTHENTICATION_HEADER,
authentication)
.type(MediaType.APPLICATION_FORM_URLENCODED_TYPE).accept(MediaType.APPLICATION_XML_TYPE).post(BlogBean.class,
newBlogParam);

    }catch (UniformInterfaceException uie) {
        if (uie.getResponse().getStatus() == 401) {
            System.out.println("Can not authenticate user
"+ConfigurationUtil.userName +
                            ". Please check your username/password and
try again." );
        } else {
            System.out.println("Error when trying to talk to app. " +
                            "HTTP status code
"+uie.getResponse().getStatus()+"returned. Finishing.");

        }
        return null;
    } catch (ClientHandlerException che) {
        System.out.println("Error when trying to talk toapp. Network
issues? " +
                        "Please check the following message and try
again later: "+che.getMessage());
        return null;
    }
    return blogBean;
}

where my ConfigurationUtil.POST_COMMENT="api/blogs/comment.xml";

The above doesnt show me any error nor the comment is posted ..

Please give suggestions.