Hmmm well I think the problem is that you are not using an ftp software to log in and download songs. You're probably using your browser's ftp function. The result is that it tries to log in several times in a row and the ftp has an anti-spam built-in function so it will kick you out.
So here is the minimum needed to connect to the ftp.
It is strongly advised to install an ftp software, like WS_FTP or FlashFTP. Such a software will particularly allow you to connect without errors and also to resume your downloads if you are disconnected by mistake. This is crucial for big files.
You can download WS_FTP for free at WS_FTP-9.zip
The general login access for now is: