In these, and many other cases, the free web-based FTP client will solve all your problems. You connect to net2ftp using a regular web browser and net2ftp translates your requests and takes care of the FTP communication.
When you visit the site, the usage is obvious: you enter the server and login information and then you can do all your FTP requiring activities from within your browser.
Website: http://www.net2ftp.com/