What isn't working for you? I just can't figure it out
You mentioned you have 3 plugins in your plugins folder... Make sure all default plugins from roundcube install are also there.
../plugins/
default_plugins
plugin_manager
qtip
global_alias
jqueryui
Install Plugin Manager (download from here:
http://unlockforus.com/download?dl_cat=4)
In your list of active plugins leave only plugin_manager since you do not have global_config plugin in your plugin's folder.
#../config/main.inc.php
$rcmail_config['plugins'] = array(
'plugin_manager'
);
Make sure you define an administrator account in your plugin_manager config.inc.php
/* Admin Account */
$rcmail_config['plugin_manager_admins'] = array('youremail@yourdomain.com', 'admin2@yourdomain.com');
Login with your administrator account credentials into your Roundcube.
Username: youremail@yourdomain.com
password: your-password
Browse to Settings >> Manage Plugins >> Have fun
That's all it takes to have it loaded... Unless we are looking at the wrong place...