Incomplete Host

When signing into my FTP, it says "incomplete host" and will not allow me to connect.

My login and password is right, and the address is the same as the others who use its is.

Any idea? Heres the log, ive tried what is in the box for the other people who us it.

[22:49:45] SmartFTP v2.5.1008.11
[22:49:45] Resolving host name "gravitypball"
[22:49:47] Unable to resolve host name.
[22:49:47] Active Help: https://www.smartftp.com/support/kb/81
[22:49:47] Cannot login waiting to retry (30s)...
[22:50:17] Continue to login attempt 2...
[22:50:17] Client closed the connection.
[22:50:17] Resolving host name "gravityxp.com"
[22:50:20] Unable to resolve host name.
[22:50:20] Active Help: https://www.smartftp.com/support/kb/81
[22:50:20] Cannot login waiting to retry (30s)...

It's a problem with your software firewall configuration:

C:\Users\mb>ftp gravityxp.com
Connected to gravityxp.com.
220---------- Welcome to Pure-FTPd [TLS] ----------
220-You are user number 11 of 50 allowed.
220-Local time is now 23:17. Server port: 21.
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.

Add SmartFTP to the exceptions in the software firewall. Then try again.

Regards,
SmartFTP