FTP Error 530 Maximum Number Of Connections 10 For Your Host Are Already Connected
530 Sorry, the maximum number of connections (10) for your host are already connected.
This error is caused by excessive opened connections via ftp. Whenever you are done with online ftp activity then close the connection from ftp properly otherwise it will be connected and some ftp or hosts may have limitations on opened connections. So after exceeding the limit you will no more be able to connect and then you will have to ask your host support from your host. There is a solution though.
Make sure that you close connection as soon as you are done with them, as some ftp clients will generally leave their connection open unless told otherwise. Additionally, some clients such as Filezilla will allow multiple connections for any new activity, which uses up connections quickly. While this does make for faster transfers.
I use mostly Cute FTP and I have been sometimes doing it to just close ftp software (Alt+F4) and not closing connection; but the point is that when you have been connected then you must close connection properly as well.