Users can only view their content from the front end

You can manage roles and capabilities using this plugin http://wordpress.org/extend/plugins/capsman/

You can even add roles and capabilities as well
http://wordpress.org/extend/plugins/capsman/screenshots/

Also the settings page of this plugin is under Tools>Capability Manager

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)