FTP failing to work is normally due to a firewall which is failing to allow through legitimate traffic. The FTP protocol is complicated and was not designed with firewalls in mind.
If you have a personal firewall product on your computer, such as ZoneAlarm, you should turn it off and see if your problem continues. If this solves your problem, you should configure your firewall to add an exception for traffic coming from ftp.simbahosting.co.uk.
You can also try the same operation from a different computer or network; if it works from there but not from your own computer then the problem is somewhere at your end and you should ask a technically knowledgeable person for help.
Alternatively you can use SFTP instead of FTP – your FTP program may have an option for this. SFTP is much more firewall-friendly than FTP.
Posted in: Questions about FTP