--- a/src/viewer_swing/java/com/glavsoft/viewer/Viewer.java	Mon May 26 19:24:52 2014 +0900
+++ b/src/viewer_swing/java/com/glavsoft/viewer/Viewer.java	Mon May 26 19:47:09 2014 +0900
@@ -285,6 +285,9 @@
 		myRfb.setTerminationType(b);
 	}
 	
+	/**
+	 * starter for TreeVNC
+	 */
 	public void startViewer() {
 		MyRfbProtoClient rfb = new MyRfbProtoClient();
 		CreateConnectionParam cp = new CreateConnectionParam(rfb);
@@ -293,6 +296,7 @@
 		isTreeVNC = true;
 		rfb.setViewer(this);
 		myRfb =  rfb;
+        settings.setViewOnly(true); // too avoid unnecessary upward traffic
 		SwingUtilities.invokeLater(this);
 	}
 	
@@ -305,6 +309,7 @@
 		isTreeVNC = true;
 		rfb.setViewer(this);
 		myRfb =  rfb;
+        settings.setViewOnly(true); // too avoid unnecessary upward traffic
 		SwingUtilities.invokeLater(this);
 	}