new connection

I have recently downloaded Smartftp for a trial but have so far been unable to get connected.Can anyone help me as I am new to this. My site is www.macavity500.com
and my FTP a/c is ftp@macavity500.com.Password entered correctly.
I am getting the following message:

SmartFTP v1.5.990.11
Resolving host name "70.96.188.21"
Connecting to 70.96.188.21 Port: 21
Connected to 70.96.188.21.
220---------- Welcome to Pure-FTPd [TLS] ----------
220-You are user number 7 of 100 allowed.
220-Local time is now 04:07. Server port: 21.
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
USER ftp@macavity500.com
331 User ftp@macavity500.com OK. Password required
PASS (hidden)
Server closed connection
Cannot login waiting to retry (30s)...