Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/GateAction.java
===================================================================
diff -u -r9481bb9c6f8c0e4d6fbed6b230a41c77feda64c6 -r5d3ddfc93be3ffa35d806a3890263e0630e860f6
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/GateAction.java	(.../GateAction.java)	(revision 9481bb9c6f8c0e4d6fbed6b230a41c77feda64c6)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/GateAction.java	(.../GateAction.java)	(revision 5d3ddfc93be3ffa35d806a3890263e0630e860f6)
@@ -230,6 +230,13 @@
                                              DynaActionForm gateForm, 
                                              Activity gate)
     {
+    	// reset all the other fields, so that the following code only has to set up its own values (LDEV-1237)
+    	gateForm.set(READ_ONLY, Boolean.FALSE);
+        gateForm.set("gate",null);
+        gateForm.set("waitingLearners",null);
+        gateForm.set("startingTime",null);
+        gateForm.set("endingTime",null);
+
         //dispatch the view according to the type of the gate.
     	if ( gate != null ) {
 	        if(gate.isSynchGate())