Problem with Action Builder and Numeric Field

Here's my scenario:

I have a form with a numeric field for the PO Amount and a text field for the Role.  I tried to create an action builder to do the following:

Condition - When numeric field PO Amount is less than 250,000

Result - Set Value of Role to be Manager

When I enter an amount less than 250,000, nothing appears in the Role text field.

Any help is appreciated!  Thanks!