just to confirm, can I know how did you created this page http://colpolsoc.org/agenda/ with the shortcodes?
eg. using EM formatting settings?
Really I don’t remmenber, I do it some years ago but now is when start to fail.
thanks
Is that page set as your main events page in Events Manager settings?
Sorry but I’m not sure where it is…
I have this

The setting I was asking about is under Evento Lista/Archivos.
Ah, ok, then the page is this one:
http://colpolsoc.org/eventos/
Thanks
In that case, you must have created the agenda page with a shortcode. If you open that page in admin what shortcode do you see?
I only see this in excrept
CONTENTS
If you want to set /agenda/ as your events page you need to leave the CONTENTS placeholder in that page and set that page as the “Events page” under Events > Settings > Pages > Event List/Archive.
If you’re still not seeing categories listed, are you logged in as a full admin user?
No, for me is ok the eventos page as event page, but I need a customize agenda page wiht this short code.
Yes, I’m full administrator adn can’t see the categories… I attach a image
http://www.awesomescreenshot.com/image/2140417/2b8a74b6fbf7103f52194d31014fa5ee
The categories problem could be a conflict caused by your theme or another plugin. To check if it is, can you test with all other plugins deactivated and while running the default WordPress theme?
You can customize your agenda page using any of these shortcodes:
http://wp-events-plugin.com/documentation/shortcodes/
You should remove the CONTENTS placeholder.
For me is impossible deactivated all the plugings… my page need it.
I don’t install any new pluging but it’s true, 18 days ago, in the page, updated all the plugings… maybe the conflict is with one updated… yours or of other one…. do you thing is possible to find the one do it without deactivated?
No, you need to do the test I mentioned. It should only take a few minutes.