Capabilities and Roles and Private Groups

Hi there,
I would like you input in figure what I did wrong.
I configuration a user in Buddypres/wordpress as Member- Role Contribuite with the capability to edit they your posts.
In Bbpres/Forum – the same user, I did configuration as Moderator.
Then In Private Grupos I put in in a Grupo Call “Moderator” – This group “Can create/edit Topics and Reply’s.
Then in the forum I check the grupo “moderator” – This grupo “Can create/edit topic and Reply’s.

So this are the configurations I did.
but the user, cannot edit reply’s or topic’s of other users, or delete them.

I what I want is that the forum moderator be able to edit/delete reply’s of other’s user and also edit topic’s of other users.
What can I change to make this happen?

Thank you for your attention
Kind Regards,
Nidia