IIF custom expression in Workflow

Hi,

I am trying to use an IIF custom expression in FIM Authorization workflow.

Before the authorization , i am using IIF statement to decide the approver.

ex 0f the IIF statement:-

IIF(Eq(xyz,"abc"),"0a257fdc-d011-4120-9c12-e942250eec97","4fd09ef4-0f8b-482b-8cb9-189777f4329c")

xyz-user attribute and "abc"- value iam comparing to.

I want the xyz user's attribute to be of Target user's but it is taking the requestor's attribute ?

Any help on the above.

shakti