550 CHMOD 666 *.php: Operation not permitted - proftpd

ProFTPd version 1.34 - Giving write permission to certain folder /directory in Linux centos 6.7

Issue : Allow write access to one user and Deny for all.

<Directory /var/www/uploads/*>
<Limit WRITE>
DenyAll
AllowUser FtpUserName
</Limit>
<Limit SITE_CHMOD>
DenyAll
AllowUser FtpUserName
</Limit>
</Directory>


If we do not define DenyAll and Deny ftpusername it will throw the error like

550 CHMOD 666 *.php: Operation not permitted if file permission is tried to change
or
Critical file transfer error  if file upload or transfer is initiated

Note : Deny Clause need to define else setting is not work (I do not find this on google but change only reflect once i added DENY)