--- a/src/alice/topology/manager/keeparive/PingScheduler.java	Mon Nov 11 17:13:41 2013 +0900
+++ b/src/alice/topology/manager/keeparive/PingScheduler.java	Mon Nov 11 18:36:34 2013 +0900
@@ -37,22 +37,26 @@
 			nextTask.setTime(postponeTime + nextTask.getTime());
 			nowTask.setTime(INTERVAL);
 			addTask(nowTask);
+			
 		} else {
+			nowTask.setTime(postponeTime);
+			list.add(0, nowTask);
+			
 			for (int cnt = 0 ;cnt < list.size();  cnt++){
 				TaskInfo task = list.get(cnt);
 				if (name.equals(task.getName())){
-					if (cnt+1 < list.size()){
+					if (cnt+1 < list.size()){ 
 						TaskInfo tasknext = list.get(cnt+1);
 						tasknext.setTime(task.getTime());
-					}
-					list.remove(cnt);
+					} 
+					list.remove(task);
 					task.setTime(INTERVAL);
 					addTask(task);
-					postponeFlag = true;
 					break;
 				}
 			}
 		}
+		postponeFlag = true;
 		notify();
 	}
 	
@@ -68,24 +72,22 @@
 		if (list.isEmpty()) {
 			list.add(newInfo);
 		} else {
-			for (int cnt = 0; cnt < list.size(); cnt++){
-				TaskInfo info = list.get(cnt);
+			int cnt = 0;
+			for (TaskInfo info : list){
 				if (info.getTime() < newInfo.getTime()){
-					newInfo.setTime(newInfo.getTime() - info.getTime());
-					if (cnt+1 == list.size()){
-						list.add(newInfo);
-						break;
-					}
+					newInfo.setTime(newInfo.getTime() - info.getTime());	
 				} else if (info.getTime() == newInfo.getTime()){
 					newInfo.setTime(newInfo.getTime() - info.getTime());
-					list.add(cnt+1, newInfo);
+					cnt++;
 					break;
 				} else if (info.getTime() > newInfo.getTime()){
 					info.setTime(info.getTime() - newInfo.getTime());
-					list.add(cnt, newInfo);
 					break;
 				}
+				cnt++;
 			}
+			
+			list.add(cnt, newInfo);
 		}
 		updateFlag = true;
 	}
@@ -95,17 +97,17 @@
 		try {
 			while(true){
 				if(list.size()== 0)System.exit(0);
+				for (TaskInfo info : list){
+					System.out.println(info.getName() +" "+info.getTime());
+				}
 				nowTask = list.poll();
 				System.out.print("taskNum "+nowTask.getTaskNum());
 				System.out.println(" taskTime "+nowTask.getTime());
 				time = System.currentTimeMillis();
 				if (nowTask.getTime()!=0)
 					this.wait(nowTask.getTime());
-				if (postponeFlag){
-					nowTask.setTime(postponeTime);
-					list.add(0, nowTask);
-					updateFlag = true;					
-					postponeFlag = false;
+				if (postponeFlag){				
+					postponeFlag = false;				
 				} else {
 					totalTime +=nowTask.getTime();
 					nowTask.setTime(INTERVAL);