App Error:104 illegalArgumentException while running the Blackberry Application

i have created one application which parsed the data and it will displyed in ListRow,for that i have created http connection as below.

enter code here
  public void run() {  
            System.out.println("Run Method called");


            HttpConnection Conn = null; 
            InputStream is = null;  
            try {      
                System.out.println("Before Connection");
                Conn = (HttpConnection)   Connector.open("MYURL;deviceside=true" );
                System.out.println("HTTP connection called");
                //conn = (StreamConnection) Connector.open("http://xyz.com/Verandah/RSS/RSSContent.aspx?CatId=4;deviceside=true");
                DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();

                    documentBuilderFactory.setCoalescing(true);
                    DocumentBuilder docBuilder = documentBuilderFactory.newDocumentBuilder();
                    Document doc = docBuilder.parse(is);

when i am running my application i am getting IllegalArgumentException.i have compiled my application and i found i am getting the above exception in this line Document doc = docBuilder.parse(is); am i doing wrong anything wrong while creating a connection? need your suggestion why i am getting except开发者_开发百科ion at this line. thanks.

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You forgot to open inputstream over httpconnection before passing it to parse() method.

In your code is == null at this line.

Add this line

is = Conn.getInputStream();

before passing is to parse() method.