We have noticed that, some mysql installations does not allow us to connect as root.
So, we updated the installer http://ehcp.net/ehcp_yeni.tgz to overcome that (Ver 0.37.10.b).

Tha problem is described shortly at http://ubuntuforums.org/showthread.php?t=2275033&p=13272495#post13272495

If you live problem in adding mysql db's, in your existing ehcp installations, you need to run:

shell$ sudo mysql -u root

(
If you are unable to connect as mysql root, try to run mysql in safe mode:
mysqld_safe --skip-grant-tables &
and then, login.
Later on, restart mysql to switch normal mode
)

[mysql] use mysql;
[mysql] update user set plugin='' where User='root';
[mysql] flush privileges;

For new installations, http://ehcp.net/ehcp_yeni.tgz is fine.