I set permissions for the registered usergroup to be able to view media that I post, using these permissions:

however when they view the embedded MP3's this is what they see:

and when they click on it they get this error:

as admin, when I look at the post, this is what I see:

and the file plays perfectly.
are there other permissions that I am missing?

however when they view the embedded MP3's this is what they see:

and when they click on it they get this error:

as admin, when I look at the post, this is what I see:

and the file plays perfectly.
are there other permissions that I am missing?