连接ftp服务器是总是提示如下信息？服务器中什么地方没有配置正确？

[yuzuhe]

[2008-10-13 16:29:56] 350 Restarting at 0. Send STORE or RETRIEVE.
命令:> [2008-10-13 16:29:56] PORT 192,168,1,15,46,246
[2008-10-13 16:29:56] 200 PORT Command successful.
命令:> [2008-10-13 16:29:56] LIST
[2008-10-13 16:29:56] 150 Opening ASCII mode data connection for /bin/ls.
错误:> [2008-10-13 16:30:27] 接受来自服务器的数据连接时发生超时(30000 毫秒)。
[2008-10-13 16:30:27] 426 Data connection closed, transfer aborted.
错误:> [2008-10-13 16:30:27] 接收到无效应答。