FTP ERROR

I have been trying to log into an ftp server over the internet, I get into
the ftp via DOS but not through windows although i am able to get the login
dialog box. the below is what happens when i try to look through the folders.
What exactly is the issue? Thx

C:\Documents and Settings\Administrator>ftp 196.7.49.228

Connected to 196.7.49.228.

220 Microsoft FTP Service

User (196.7.49.228none)):d

331 Password required for

Password:

230-Welcome to the Khanyisa FTP Server.

230 User ftpATS logged in.

ftp> ?

ftp> ls

500 Invalid PORT Command.

150 Opening ASCII mode data connection for file list.