Cognos Scheduled Report Authentication Issue

[PharmaUser1958]

We are getting this error sporadically and we have not been able to fix it.
CM-REQ-4159 Content Manager returned an error in the response header. The error "cmAuthenticateFailed CM-CAM-4005 Unable to authenticate. Check your security directory server connection and confirm the credentials entered at login." can be found in the response SOAP header. CM-REQ-4342 An error occurred with the client.

We have changed the controllerServer property because it had a "80" instead of "8443".  This did not work.

I can renew my credentials but it only last for a day or two.