Do you get any messages in your PHP error log?

Thanks for your answer Kevin. Sorry for my stupidity but, where can I find and see the error log with Xampp?

On my machine it is here:

xampp/apache/logs/phperror.log

Ok, my file is: xampp/apache/logs/error.log

[Wed Mar 10 14:07:13 2010] [error] [client 127.0.0.1] La clase 'ElggUnsearchableObject' no ha sido encontrada, plugin perdido?, referer: http://localhost/elgg/action/form/manage_form
[Wed Mar 10 14:07:13 2010] [error] [client 127.0.0.1] ID for field Locomotora is 0, referer: http://localhost/elgg/action/form/manage_form
[Wed Mar 10 14:07:13 2010] [error] [client 127.0.0.1] La clase 'ElggUnsearchableObject' no ha sido encontrada, plugin perdido?, referer: http://localhost/elgg/action/form/manage_form

Yikes!

That was created by experimental code that should have been removed in the current release.

My apologies.

Unfortunately, Elgg caches object classes and so the only way to fix that is to edit your database.

Look in the entities_subtypes table and set "ElggUnsearchableObject" wherever you see it in the class column to the empty string.

Please tell me if that works for you.

I have set this plugin collection to private access until I can get out another release.

Only in the subtype column, form_data is empty, so I set ElssUnsearchableObject, but it doesn't work.

ElggUnsearchableObject should be removed everywhere, not added.

Sorry Kevin, my English isn't very good, so I misunderstood you before.

I did what you said and now the plugin works. It's a great plugin.

Now the blank page is displayed when I click the link View all (/mod/form/my_forms.php?id=78&form_view=all)