Groups Problem


I am using the Elgg 1.5 and i am having this important problem with the Plugin Group.

When a user is in a group a write a post or include any archive into the grupo with the restriction of "only to be viewed by the members of the group", only the user that made the post can see it. No other member in the group can see the post or the archive.

This doesnt happend when in the same group a member make a post or upload an archive and mark it as "for my friends" or "for the members of my elgg net".

Can anyone help me to solve this important problem or at least give me any advise that could help me to find the solution to it?

Thank you very much!