# HBook does not update with my iCal external calendars automatically. The sync has stopped.

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 Problem

- The sync is not working properly. When I receive a reservation on an external calendar, it does not import into HBook.
- HBook does not update automatically, and I have to click on "Update calendars" for the synchronization to run.

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 Solution

If the sync has stopped, we recommend proceeding as follows:

1. Deactivate and re-activate HBook: the wp\_scheduled\_event which is responsible for the synchronization is registered upon plugin activation
2. If that does not solve your issue, install [WPCrontrol](https://wordpress.org/plugins/wp-crontrol/) plugin and check that the 'hb\_ical\_synchronized' cron appears
3. If it appears, but it is not triggered, you should try to modify your wp-config.php file to set an alternate cron, as explained [here](https://codex.wordpress.org/Editing_wp-config.php#alternative_cron) in the codex adding in your wp-config.php :  
define( 'ALTERNATE\_WP\_CRON', true );
4. If the issue remains after taking the steps above, send us a [support request](https://maestrel.atlassian.net/servicedesk/customer/portal/3/group/8/create/69).