Clan Size

when a member of my forum was trying to join a clan he gets the following:

The Clan has reached its max size of members, it currently has 5 members

There is a motive why the max members is 5, if not where I can modify the code to accept more members

[Revan]

To increase the number of possible Clan Members, your clan needs to advance in Clan Rank.
To advance in Clan Rank, members of your clan needs to win battles.
But beware, losing battles causes Clan Points to decrease.