[otrs] RO Groups can't view Queues

Dear Sirs. I have this queue tree * Networking - NET_AR - NET_BR - NET_US And I have a group called AR_Users... If I assign RO permissions to Networking queue and RW permissions to NET_AR queue then my users can't see any queue. I realice some test using diferent kind of permission sets and I found that RO permissions doesn't work correctly Can anyone helpme?? Best regards _________________________ Fabián G. Ferdgelis