My b2evolution Version: 3.3.1

I'M with 3.3.1, I do give permission to my members with "privilege bloggers" and allow them to edit and upload files o.k.... but not been able to make them insert a media file link. The only way the could so, is to give them the admin permission, but really dont whant them to be there... No way to change it in user's permission or groupe permission... IT's all or nothing

Could someone can tells me how to enable possibility to my privilege bloggers to link media file ( little green film tag when you wite a new post). Could I have to change something in code source in admin.php?

I'M at an inche to have permission I want to give them...
Thank's for your help!