Android :: Posting Message On Friend Wall In Facebook

I have a problem in posting a message on friends wall in facebook. I write below code for posting a message.

private void postwall(){ try { FBRequest streamRequest = FBRequest.requestWithDelegate(new FBRequestDelegateImpl());
Map<String, String> parameters = new HashMap<String, String>();
frdlist = new String[list.size()]; for(int j=0;j < list.size();j++){
if (list.get(j).isChecked()) { frdlist[j]=String.valueOf(list.get(j).getUserid());
parameters.put("message", "HI.... its a test application of Dates Near Me");
parameters.put("attachment", "{"name":"Facebook Connect for Android","href":"http://code.google.com/p/fbconnect-android/","caption":"Caption","description":"De scr iption","media":[{"type":"image","src":"http://img40.yfrog.com/img40/5914/iphoneconnectbtn.jpg","href":"http://developers.facebook.com/connect.php?tab=iphone/"}],"properties":{"anotherlink":{"text":"Fac eb ook homepage","href":"http://www.facebook.com"}}}");
parameters.put("auto_publish" ,"true");
parameters.put("target_id" ,frdlist[j]);
parameters.put("uid" ,String.valueOf(FBSession.getSession().getUid()));
streamRequest.call("stream.publish", parameters);
} } } catch (Exception e) {
// TODO Auto-generated catch block e.printStackTrace();
} }
I am passing three values: message,target_id and uid. All values I get perfectly. But when I check my friends wall that time message is not display on wall.