Hello dano63,

Welcome to the Monastery.

I would suggest to add this line after your connect to see the actual die error:

$sftp = Net::SFTP::Foreign->new($host);
$sftp->error and die "unable to connect to remote host: " . $sftp->err
+or;
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Why you do not use SSH keys which is more secure and not required to apply to send the psw? Sample:

my %args = ( host     => "localhost",
         user     => "user",
         port     => "22",
         # psw    => "psw",
         key_path => "/home/user/.ssh/id_rsa" );

my $sftp = Net::SFTP::Foreign->new(%args);
$sftp->die_on_error("Unable to establish SFTP connection");
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Update: Fellow Monk salva provided you with an answer to your problem. In case you want to get a running sample of code using ssh keys in a relevant question Re: Generate temporary file and FTP upload.

Hope this helps, BR.