disabling close when escape key is pressed

I reviewed #993032: custom size window, and based on this tried putting the following code at the top of template.php:

automodal_add('.automodal-noclose', array('customDialogOptions' => array('closeOnEscape' => false)));

This didn't work, so I tried this:

automodal_add('.automodal-noclose', array('closeOnEscape' => FALSE));

which also didn't work.

Is it possible to do what I am trying to do?

Thanks!