CS4 'the connection to the remote host was lost.

Suddenly, I get the error message (CS4) when I try to connect to remote hosts: "the connection to the remote host has been lost. Click Refresh to reconnect. "It is impossible to connect to a remote host.

This happens for all my sites on remote servers in different countries, so it must be a problem of DW. Please advice.

Have you tried to use passive mode:

Definition of site > advanced > click on the passive FTP box and see if it works.

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