I'm not exactly sure what the problem is. Here is what happened when I used Filezilla:
Status: Resolving IP-Address for leetradio.kicks-ass.org
Status: Connecting to 82.46.78.179:21...
Status: Connection established, waiting for welcome message...
Response: 220 Microsoft FTP Service
Command: USER anonymous
Response: 331 Anonymous access allowed, send identity (e-mail name) as password.
Command: PASS **************
Response: 230 Anonymous user logged in.
Command: SYST
Response: 215 Windows_NT
Command: FEAT
Response: 211-FEAT
Response: SIZE
Response: MDTM
Response: 211 END
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PASV
Response: 227 Entering Passive Mode (192,168,11,2,15,88).
Command: LIST
Response: 425 Can't open data connection.
Error: Failed to retrieve directory listing