Req Workflow - Approval Process Definition

Hi everyone,

We are on Peoplesoft 9.1. We are trying to setup workflow where workflow would only initiate if the Item ID or the Vendor item ID is blank on a requisition line.  I have tried the setup below, but it does not seem to want to work. Does anyone know if there is a way to setup "OR" criteria, b/c I think the way it shows below, it is looking for both scenarios.  I did uncheck "All Criteria needed to satisfy" but it did not seem to make a difference.

Any help is appreciated! Thank you

Peter