FTP access unreliable

This problem is probably an issue with my webspace provider, but it seems that there is a lot of randomness with the connection to the server.

Up until the point when I made this post, I was getting a "530 Not logged in." error over and over again. This or something similar has been happening with my connection for a long time now. Just before I made this post, I was magically connected to the service for no particular apparent reason as I did not change anything.

I would like some input about what could be happening here and to know if there is anything that I can do to remedy the problem.