public static void addWall(final LitterBuggAPICallback callback, float latitude, float longitude, String title) {
	Network n = new Network();
    	String url = LBConstants.LB_NEW_WALL_URL;

    	Hashtable params = new Hashtable();
    	params.put("lat", String.valueOf(latitude));
    	params.put("lon", String.valueOf(longitude));
    	params.put("title", title);

    	n.setAuthorization(LitterBugg.oauth.oauth_header(url, HttpProtocolConstants.HTTP_METHOD_POST, params));

//    	n.doPost(url, (byte[])null, new LitterBuggCallback(callback) {
//    	n.doGet(url, new LitterBuggCallback(callback) {

    	n.doPost(url, params, new LitterBuggCallback(callback) {
    		public void onNetworkRequestSuccessful(InputStream reply) {
    			String response = parseISToString(reply);
    			System.out.println("********** add wall response **********\n" + response);
    			System.out.println("*******************************");
    			Object[] o = new Object[0];
    			cb.onRequestSuccessful(o);
    			/*Object[] p = parseWalls(reply);

    			System.out.println("here are the walls:");
    			for(int i = 0; i < p.length; i++) {
    				System.out.println("Wall = [" + ((Wall)p[i]).getTitle() + "]");
    			}

    			cb.onRequestSuccessful(p);*/
    		}
    	});
}