Why is the archive corrupted after being sent from one server to another via ftp?

Question

bash

I archive the backup, send it to another server with a script:

cd $BACKUP
DUMPFILE=mysql-$NOW.tar.gz
$FTP -n $FTPS <<END_SCRIPT
quote USER $FTPU
quote PASS $FTPP
cd $FTPD
put $DUMPFILE
quit
END_SCRIPT

The files are loading, everything is fine, but they become broken! What could be the problem?
On the server where the archive is created, the archive opens fine, on the receiving server the archive is a couple of kb larger for some reason and already broken.

Answer 1

Corrected script:

cd $BACKUP
DUMPFILE=mysql-$NOW.tar.gz
$FTP -n $FTPS < quote USER $FTPU
quote PASS $FTPP
binary
cd $FTPD
put $DUMPFILE
quit
END_SCRIPT