User friendly response to PAUSE command.

src/main/java/altk/comm/engine/Broadcast.java

@@ -983,7 +983,7 @@ public abstract class Broadcast
 	    switch (result.stateChangeStatus)
 	    {
 	    case SUCCESS:
-	        responseContent = "Broadcast canceled";
+	        responseContent = "Broadcast is being canceled";
 	        break;
 	    case NO_CHANGE:
 	        responseContent = "Already canceled";
@@ -1000,9 +1000,17 @@ public abstract class Broadcast
     {
 		// Sets state to PAUSING, which is monitored by Broadcast.Service threads.
 		// EVentually, when all service activity ends, the state transitions to PAUSED
-		setState(BroadcastState.PAUSING);
-		lastPauseCount = 0;
-		if (out != null) out.write("Broadcast paused");
+		StateChangeResult result = setState(BroadcastState.PAUSING);
+		switch (result.stateChangeStatus)
+		{
+		case FORBIDDEN:
+			if (out != null) out.write("pause not allowed");
+			break;
+		case SUCCESS:
+			lastPauseCount = 0;
+		case NO_CHANGE:
+			if (out != null) out.write("Broadcast is being paused");
+		}
     }
 	
 	protected void resume(PrintWriter out)