Lookup Fields... and Criteria

Hello,

I have two applications. One application is a help desk for employees to submit tickets through... the other, is an application that simply stores data, such as employee names and associated values.

In the storing application, it has a list of employees, and their status (active or inactive). I would like to have a dropdown in the help desk ticket submission form that pulls all the employees names from the second application who's status is "active".

I've tried to do this, but the criteria scripting keeps saying that the Employee.Status field does not exist!

Thanks