getting iStatus: HTTP Version Not Supported ??

[nHulk]

public class SendMessage {

    public static void main(String[] args) throws UnsupportedEncodingException
    {
        //String strMsg=java.net.URLEncoder.encode("This is API msg", "UTF-8");
        callURL("https://api.mVaayoo.com/mvaayooapi/MessageCompose?user=[e-mail]:1111&senderID=TEST SMS&receipientno=9999999999&dcs=0&msgtxt=msg&state=1");
    }

     public static void callURL(String strURL){
        System.out.println(" URL is :"+strURL);
        try{
            URL obj = new URL(strURL);
            HttpURLConnection httpReq = (HttpURLConnection)obj.openConnection();
            httpReq.setDoOutput(true);

            httpReq.setInstanceFollowRedirects(true);
            httpReq.setRequestMethod("GET");
            String iStatus = httpReq.getResponseMessage();
               System.out.println("iStatus: "+iStatus);

        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        }catch (IOException ex) {
            ex.printStackTrace();
        }catch(Exception e){
            e.printStackTrace();
        }
    }

}