Setup DirectAdmin on OS CentOS error

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*   All parts have been installed   *
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Type: /sbin/service httpd restart
./install.sh: ./directadmin: /lib64/ld-linux-x86-64.so.2: bad ELF interpreter: No such file or directory
./install.sh: ./directadmin: /lib64/ld-linux-x86-64.so.2: bad ELF interpreter: No such file or directory

System Security Tips:
  http://help.directadmin.com/item.php?id=247