Workflow category‘s properties "Module" lookup value can not get new value from Enum:SysModule

In AX2009, under the WorkflowCategories i was created a new category call 'ABC'

I want to set a new Module  for category 'ABC', so i added a new element 'Test' under Enum: SysModule, save the change...

Select the category 'ABC' and open the properties window, when i click the lookup button in properties 'Module' , i can't find the 'Test' value in the list.

Why?!

Is the lookup value lookup from SysModule? How i can add a new module for the category?

Thanks.
AX Lover