proftpd problem,can't login,ERROR:> Timeout (60000 ms) occurred on receivin
 

STATUS:> Getting listing ""...
STATUS:> Connecting to ftp server 221.126.134.112:21 (ip = 221.126.134.112)...
STATUS:> Socket connected. Waiting for welcome message...
220 localhost.localdomain FTP server ready
STATUS:> Connected. Authenticating...
COMMAND:> USER mydrive120
331 Password required for mydrive120.
COMMAND:> PASS *****
230 User mydrive120 logged in.
STATUS:> Login successful.
COMMAND:> PWD
257 "/" is current directory.
STATUS:> Home directory: /
COMMAND:> FEAT
211-Features:
MDTM
REST STREAM
SIZE
211 End
STATUS:> This site supports features.
STATUS:> This site supports SIZE.
STATUS:> This site can resume broken downloads.
COMMAND:> REST 0
350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer
COMMAND:> PORT 221,126,135,51,5,81
ERROR:> Timeout (60000 ms) occurred on receiving server response.
ERROR:> Failed to establish data socket.

i'm using router and use port mode to login it,but i can't login it now! help me please,i use internal ip can login

thanks in advance