这是我的配置文件：

tickTime=2000
initLimit=20
syncLimit=5
dataDir=./store/data
clientPort=2181

server.1=A:3181:4181
server.2=B:3181:4181
server.3=C:3181:4181
server.4=D:3181:4181
server.5=E:3181:4181

之后，我启动了所有的服务器。然后我在其中一个节点上启动了客户端。它显示已连接，但只要我输入任何命令，它就会抛出异常并停止。

WatchedEvent state:SyncConnected type:None path:null
[zk: 127.0.0.1:2181(CONNECTED) 0] ls /
2012-11-08 22:35:01,418 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1083] - Client session timed out, have not heard from server in 20000ms for sessionid 0x13ae22116e50001, closing socket connection and attempting reconnect

WATCHER::

WatchedEvent state:Disconnected type:None path:null
Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
    at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1463)
    at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1491)
    at org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:725)
    at org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:593)
    at org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:365)
    at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:323)
    at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:282)

所需端口已打开（2181、3181、4181）
正在放置myid，并且具有与ip地址对应的正确id
java版本：java版本“1.7.0\u 09”java（tm）se运行时环境（build 1.7.0\u 09-b05）
知道怎么回事吗？
提前谢谢。