On one of our sql 2005 servers we are no longer able to give any users server roles (ex. sysadmin). It appears to be successful both through the UI and through code. But when we check in the db and in the UI the role is unchecked and not shown for the user in the master db. Permissions don't seem to be the issue as we are testing this as system administrator levels of access. There are also no errors in the log.