This might sound like stupid questions, but just bear with me:
are you using the correct username and password?
does eclipes use FTP to connect, if so, do you have FTP enabled for that account?
I spent a load of time with a similar problem not to long ago. I was confused because ssh would connect fine, but FTP would not.
Turns out I had previously created an SSH key, so no password was required to login via ssh, and I was using the wrong password with FTP.
Updating the password and making sure FTP was allowed for that user fixed the problem.
Seems like eclipse would allow sftp connections, although I have never used it