Mail Fetching, Business Units, and Rules

Hi

We currently have SupportCentre Plus fetching mail from a mailbox and creating calls from it. We have the need to create a separate Business Unit (we'll call it 'ABC') and have it pick up emails and assign them to Groups/Categories within the ABC Business Unit.

If I create a Business Rule under the new ABC Business Unit that looks for a subject of ##ABCDesktop or ##ABCInfrastructure, it should assign it to the ABC Desktop or ABC Infrastructure group within the ABC Business Unit and assign the ABC Desktop or ABC Infrastructure category as necessary. It doesn't, it just creates a call in the 'General' Business Unit as normal.

Does anyone have any ideas on how do we go about this, if it's possible?

Cheers, James