Roles in Project Manager

Don't know if this is related to my previous post about milestones not working,

When I try to access roles (PM > Edit > Members tab > Roles "Edit" button), the popup shows the home page. The error log shows:

W   37   2008/11/23 - 07:53   projectmanager   ,   0   2008/11/23 - 07:53   W   BadmenuactionVariable   attempted to access private method: 'roles'
/var/www/p/egroupware/index.php 139