We have a site which we'd like to give a small number of users the ability to edit a small part of the site.

We've created a new security group, and created a new user and added to this group. However, this user cannot access the CMS back end at all unless 'Full administrative rights' are assigned to this group. If anything else at all is assigned and the aforementioned is not present, a completely blank page is shown.

Can anyone assist with this, as we're sure this isn't how it should be.