Workflow - BO event linkage to transaction IMA13 (AR Approval).

Hi,

I am working with Appropriation Request approval workflow in transaction IMA13 and workflow should trigger "while saving" the IMA13.

I have configured the custom workflow and created custom bisuness object(ZBUS2104), with reference of (BUS2104) to tigger the workflow.

In BO, I have created the event 'CHANGED'.

My question is, how to link my businees object to the transaction IMA13.

Thanks for your help.

Best Regards,

Thiru