Permission in collaboration room

Hi

Slowly I´m getting really angry because of the permission-system in SAP EP.

I have the public collaboration room "SAP NetWeaver Portal". If somebody enters this room (public role), he should be able to download documents and read news. Another person (content manager role) should be able to upload documents and to post news. I have applied a second public role extra, because it was not possible to configure the predefined public role as initial role!!!

But it doesn´t matter whether the person entering the portal has a public role or a content manager role. Everybody is allowed to upload documents and to post news. How can I restrict the permission to publish?

Thanks for help.

Regards,

Sven