function activateUser( &$user, $ui, $cause, $mailToAdmins = true, $mailToUser = true, $triggerBeforeActivate = true ) {
	global $_CB_database, $ueConfig, $_PLUGINS;

	static $notificationsSent	=	array();

	$activate = ( $user->confirmed && ( $user->approved == 1 ) );
	$showSysMessage = true;
	$messagesToUser = getActivationMessage( $user, $cause );

	if ( $cause == 'UserConfirmation' && $user->approved == 0) {
		$activate = false;
		$msg = array(
			'emailAdminSubject'	=> array( 'sys' => _UE_REG_ADMIN_PA_SUB ),
			'emailAdminMessage'	=> array( 'sys' => _UE_REG_ADMIN_PA_MSG ),
			'emailUserSubject'	=> array( ),
			'emailUserMessage'	=> array( )
		);
	} elseif ( $user->confirmed == 0 ) {
		$msg = array(
			'emailAdminSubject'	=> array( ),
			'emailAdminMessage'	=> array( ),
			'emailUserSubject'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_pend_appr_sub'] ) ) ),
			'emailUserMessage'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_pend_appr_msg'] ) ) )
		);
	} elseif ( $cause == 'SameUserRegistrationAgain' ) {
		$activate = false;
		$msg = array(
			'emailAdminSubject'	=> array( ),
			'emailAdminMessage'	=> array( ),
			'emailUserSubject'	=> array( ),
			'emailUserMessage'	=> array( )
		);
	} elseif ( $user->confirmed && ! ( $user->approved == 1 ) ) {
		$msg = array(
			'emailAdminSubject'	=> array( 'sys' => _UE_REG_ADMIN_PA_SUB ),
			'emailAdminMessage'	=> array( 'sys' => _UE_REG_ADMIN_PA_MSG ),
			'emailUserSubject'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_pend_appr_sub'] ) ) ),
			'emailUserMessage'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_pend_appr_msg'] ) ) )
		);
	} elseif  ( $user->confirmed && ( $user->approved == 1 ) ) {
		$msg = array(
			'emailAdminSubject'	=> array( 'sys' => _UE_REG_ADMIN_SUB ),
			'emailAdminMessage'	=> array( 'sys' => _UE_REG_ADMIN_MSG ),
			'emailUserSubject'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_welcome_sub'] ) ) ),
			'emailUserMessage'	=> array( 'sys' => getLangDefinition( stripslashes( $ueConfig['reg_welcome_msg'] ) ) )
		);
	}
	$msg['messagesToUser']		=	$messagesToUser;

	if ( $triggerBeforeActivate ) {
		$results = $_PLUGINS->trigger( 'onBeforeUserActive', array( &$user, $ui, $cause, $mailToAdmins, $mailToUser ));
		if( $_PLUGINS->is_errors() && ( $ui != 0 ) ) {
			echo $_PLUGINS->getErrorMSG( '<br />' );
		}

		foreach ( $results as $res ) {
			if ( is_array( $res ) ) {
				$activate		=	$activate			&& $res['activate'];
				$mailToAdmins	=	$mailToAdmins		&& $res['mailToAdmins'];
				$mailToUser		=	$mailToUser		&& $res['mailToUser'];
				$showSysMessage	=	$showSysMessage	&& $res['showSysMessage'];
				foreach ( array_keys( $msg ) as $key ) {
					if ( isset( $res[$key] ) && $res[$key] ) {
						array_push( $msg[$key], $res[$key] );
					}
				}
			}
		}
		if ( ! ( $mailToAdmins && ( $ueConfig['moderatorEmail'] == 1 ) ) ) {
			unset( $msg['emailAdminSubject']['sys'] );
			unset( $msg['emailAdminMessage']['sys'] );
		}
		if ( ! $mailToUser ) {
			unset( $msg['emailUserSubject']['sys'] );
			unset( $msg['emailUserMessage']['sys'] );
		}
		if ( ! $showSysMessage ) {
			unset( $msg['messagesToUser']['sys'] );
		}
	}

	if ( $activate ) {
		$query = 'UPDATE #__users'
		. "\n SET block = 0"
		. "\n WHERE id = " . (int) $user->id;
		$_CB_database->setQuery( $query );
		if ( ( !$_CB_database->query() ) && ( $ui != 0 ) ) {
			echo 'SQL-unblock1 error: ' . $_CB_database->stderr(true);
		}
		$user->block			=	'0';

		$user->removeActivationCode();
	}

	if ( $activate ) {
		$_PLUGINS->trigger( 'onUserActive', array( &$user, $ui, $cause, $mailToAdmins, $mailToUser ) );
		if( $_PLUGINS->is_errors() && ( $ui != 0 ) ) {
			 $msg['messagesToUser']	=	$_PLUGINS->getErrorMSG( '<br />' )
			 						.	$msg['messagesToUser'];
		}
	}
	if ( ! isset( $notificationsSent[$user->id][$user->confirmed][$user->approved][$user->block] ) ) {		// in case done several times (e.g. plugins), avoid resending messages.
		$cbNotification				=	new cbNotification();

		if ( $ueConfig['moderatorEmail'] && count( $msg['emailAdminMessage'] ) ) {
			$pwd					=	$user->password;
			$user->password			=	null;
			$cbNotification->sendToModerators( implode( ', ', $msg['emailAdminSubject'] ),
											   $cbNotification->_replaceVariables( implode( '\n\n', $msg['emailAdminMessage'] ), $user ) );
			$user->password			=	$pwd;
		}

		if ( count( $msg['emailUserMessage'] ) ) {
			$cbNotification->sendFromSystem( $user, implode( ', ', $msg['emailUserSubject'] ), implode( '\n\n', $msg['emailUserMessage'] ) );
		}
		$notificationsSent[$user->id][$user->confirmed][$user->approved][$user->block]	=	true;
	}
	return $msg['messagesToUser'];
}