Error on UPDATE: INSUFFICIENT_PERMISSION

Ok, I have ADMIN 3 on this puppy, I am not even setting the lastmodifieddate.  Is this a setting somewhere?

object(nsWriteResponse)#12173 (3) {
  ["isSuccess"]=>
  bool(false)
  ["statusDetail"]=>
  array(1) {
    [0]=>
    object(nsStatusDetail)#19691 (3) {
      ["code"]=>
      string(23) "INSUFFICIENT_PERMISSION"
      ["message"]=>
      string(266) "You do not have permissions to set a value for element lastmodifieddate due to one of the following reasons: 1) The field is read-only; 2) An associated feature is disabled; 3) The field is available either when a record is created or updated, but not in both cases."
      ["type"]=>
      string(5) "ERROR"
    }
  }
  ["recordRef"]=>
  NULL
}