Can anyone provide an example of how I would send a message back from the client, specifically in the Android_StockListDemo?

Code:
           try {
                lsClient.getLSClient().sendMessage("test");


            } catch(Exception e) {
                Log.e(e.getMessage());
            }
Gives me com.lightstreamer.ls_client.PushConnException: java.io.FileNotFoundException: http://192.168.1.148:8080/lightstrea...nd_message.txt

I am pretty sure I need to configure MessageInfo and SendMessageListener but I am not sure how. Thanks.