Error restoring database

i am getting this error and I couldn’t find any answers regarding this in this forum:

ERROR: Unbekannte Interpunktion @ 5
STR: />
SQL:
<b>Warning</b>: readfile() has been disabled for security reasons in <b>/home/www/samson/na/nay-k/latinaevent/wp-content/plugins/wp-db-backup.php</b> on line <b>616</b>
SQL-Befehl:

<b>Warning</b>: readfile() has been disabled for security reasons in <b>/home/www/samson/na/nay-k/latinaevent/wp-content/plugins/wp-db-backup.php</b> on line <b>616</b>

MySQL meldet:

#1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘
<b>Warning</b>: readfile() has been disabled for security reasons in <b>’ at line 1

what’s wrong? can somebody help me?