Have you made ANY changes/updates, additions, removals from your computer lately?
Since 2000, I have never seen or read about error 20142 in CSB.
After some research on the web, I found that with some other software with FTP uploading errors defines:
Error:20142, 530 User cannot log in. invalid credentials for logging into ftp site.
Another says this:
20142 Open Session and EscapeShellCmd problem
SO, my expectation is that the problem is on your HOST side.
Connecting to your host with an ftp client or using windows connections.
Let your host know that you are having problems connecting and recheck your username/password combo as well as the other settings.
They may have been working in the server and something got reset, or you may have been moved to a different server, etc.
Let us know.
(moved your thread for better organization...put in CSB publishing area)