Joomdle Wrapper Menu item - Browser security error

We've enabled the "Allow frame embedding" setting in Moodle but we're still seeing the security warning in place of Moodle loading in a wrapper in Joomla. Is there another setting that is required to make the wrapper display work?

I discovered that I also had to add the following to the Moodle site's .htaccess file in order to allow Moodle to be framed.

Thanks for the info, I had never used that, but will keep it in mind if other users report similar problems.