Can't find symbol '_mysql_plugin_interface_version_' in library Error (no replies)

Hello;

I have just installed Mysql Cluster 7.4.7 with 1 management and 2 nodes.

It is working.

But I also would like to use memcached options which already enabled in this version according to document.

While installing memcache plugin I am getting following errors;

mysql> install plugin daemon_memcached soname "libmemcached.so";
ERROR 1127 (HY000): Can't find symbol '_mysql_plugin_interface_version_' in library

I think therefore nothing caching.

[root@mysql1 ~]# memcached-tool 10.34.21.11:11212 dump
Dumping memcache contents
Number of buckets: 0
Number of items :

How can I enable daemon_memcached plugin?

Thanks in advanced.