Private group members cannot see documents

Hi, my collaborator cannot see the documents in a shared group. She has accepted the invitation and I can see her name under the Members tab. I made her Admin but that doesn't change anything. I changed the group settings to Public and then she can see the documents but can't access the pdf's. Any advice? Thanks, Birthe http://www.mendeley.com/groups/4725321/meta-analysis-forages/