The Cannot Resolve Host Name message is displayed when CuteFTP Mac cannot make a connection to the FTP Host Address that you specified when you set up the connection. It could be compared to browsing to a web site that either is not up at the moment or does not exist. There are several ways to approach this situation:
Make sure you are connected to the Internet. If you are not connected to the Internet, you will need to connect before you can connect to any FTP sites.
Make sure you typed the FTP host address correctly. This would be just the host address of the server. For example, if you were given an FTP host address in the format: ftp://ftp.yourhost.com, you would only type in ftp.yourhost.com. Also be sure there is nothing after the host address, especially slashes ("/") indicating subfolders. If the server does not automatically put you in your default folder when you log in to it, then you can add the folder into the Default Remote Folder box when configuring this site.
Make sure you are not trying to connect to an HTTP server, such as http://www.cuteftp.com. You cannot connect to an HTTP (web) server with CuteFTP Mac. If you do not know the FTP host address for your site, you will need to contact your server administrator for more information. GlobalSCAPE does not know or keep track of FTP host addresses.
If you have a firewall, it must be properly configured for FTP access. If the Firewall is on a network, you will need to contact your network or system administrator for help.
If all of these options fail and you still have the same results, you will need to contact the server administrator of the site you are connecting to in order to resolve the problem.