Hi,
You should probably change this statement “addDays($IteratorRequest/….WorkflowInstance/DueDate,1) = [%CurrentDateTime%] “
to
“addDays($IteratorRequest/….WorkflowInstance/DueDate,1) < [%CurrentDateTime%] “
So if the duedate is in the past, send the reminder. Now you are saying that duedate must be equel to current date time, which it most probably isn't.