# ftp transfer
my $ftp = Net::FTP->new ($server, Timeout => 9000, Debug => 3);
$ftp or die "$server: cannot connect: $@";
# If you don't use ~/.netrc
$ftp->login ($user,$passwd) or
die "$_: Could not login: " . $ftp->message;

# change remote directory
my ($f1, $f2, $ftp_upload_location) = @$f;
$ren[0]->[2] = "/DE/IN";
$ren[1]->[2] = "/DE/OUT";
$ftp->cwd ($ftp_upload_location);