LS-CH320L v1，固件版本：1.12。无法telnet，什么原因啊？

输入java -jar acp_commander.jar -t 192.168.1.3 -o后，接下来就是telnet了，可是提示无法连接呀：


F:\>java -jar acp_commander.jar -t 192.168.1.3 -o
ACP_commander out of the nas-central.org (linkstationwiki.net) project.
Used to send ACP-commands to Buffalo linkstation(R) LS-PRO.
WARNING: This is experimental software that might brick your linkstation!

Using random connID value = 593DC17BDB41
Using target:   LS-CHL478/192.168.1.3
Starting authentication procedure...
Sending Discover packet...
Found:  LS-CHL478 (/192.168.1.3)        LS-CHL(HANZEI) (ID=00016)       mac: 00:
1D:73:A4:74:78  Firmware=  1.120        Key=0511D420
Trying to authenticate EnOneCmd...      ACP_STATE_OK
start telnetd...
Reset root pwd...
You can now telnet to your box as user 'root' providing no / an empty password.
F:\>telnet 192.168.1.3
正在连接192.168.1.3...无法打开到主机的连接。 在端口 23: 连接失败