Enable anonymous access
You must enable anonymous access on the site collection for the forms authentication logon page to work from Office SharePoint Server. Contact your administrator to have anonymous access enabled in Central Administration and IIS.
Add users to the Approvers and Members groups
Users in the Approvers group can publish pages, images, and documents in this site. Users in the Members group can create and edit pages, and they can upload images and documents, but they cannot publish the pages, images, or documents. Workflow is enabled in the Pages library, and content approval is enabled in the Documents and Images libraries.