No administrator for task found

[Abby Dywan]

Hi all -
 
I'm trying to use a workflow I recently transported from our Dev
environment to QA.  In dev it works just fine, but when I run it in QA I
get an error when I double-click upon the work item in my inbox.   "No
Administrator found for task."  I'm not hitting this error with the other
workflows I've put into QA.  Any suggestions as to what might be the cause?
 
Any help is appreciated!
Abby  :)