Unable to download after connection

USER abc777
[09:54:24] Server closed connection
[09:54:24] Connect failed. Waiting to retry (30s)...
[09:54:54] Connection attempt 5...
[09:54:54] Resolving host name "www.xyz.com"
[09:54:54] Connecting to Port: 21
[09:54:54] Connected to www.xyz.com.
[09:54:54] 220---------- Welcome to Pure-FTPd [TLS] ----------
[09:54:54] 220-You are user number 1 of 200 allowed.
[09:54:54] 220-Local time is now 09:48. Server port: 21.
[09:54:54] 220-This is a private system - No anonymous login
[09:54:54] 220-IPv6 connections are also welcome on this server.
[09:54:54] 220 You will be disconnected after 15 minutes of inactivity.

These messages keeps on repeating. I want to download all the files from the server and upgrade the website. help please.

Post the complete log. But it looks like you have the wrong username/password.