Due to spam, we disabled the user registration.  However, instead of the default phrase 'User Registration is disabled', we would like to add a customized message telling people how to manually send us a registration request.  I navigated to the dashboard, selected 'phrases', and located the phrases I'd like to update.  Here I clicked 'Edit', made my changes and then 'updated' them.  After this, I navigated back to the dashboard and clicked 'delete phrase cache'.  However, nothing has changed and the original 'User Registration is Disabled' phrase is still there.  My new phrase doesn't appear.  Could you tell me what I'm doing wrong?  It seems like this should be straightforward, and I've read the documentation, but I'm still missing something.  Is there a different way to do this?