failed to authenticate user error message when attempting to login with external authentication imp (NETIQKB51126)

fact
NetIQ Vulnerability Manager 5.5

symptom
"failed to authenticate user" error message when attempting to login with external authentication implemented.

symptom
Created a new athentication source after applying Service Pack 1 and I now recieve an "unable to authenticate user" error message when logging in. 

fix

To resolve this issue download hotfix 51132 from below and apply.

https://www.netiq.com/support/vsm/extended/hotfixes.asp

Formerly known as NETIQKB51126