Does Expense Account Rules works for an Inventory Item?

Hi,

I have successfully used Expense Account Rules functionality to default PO Charge Account based on Item Category for an Expense Item in past.

Now when I try to default/change PO Charge Account using Expense Account Rules for an "Inventory Item", functionality is not working. Has anyone ever used Expense Account Rules to change PO Charge Account for an Inventory Item? Kindly share your insight or solution.

Application Setup is as follows:

1. No Expense Account at Item Level

2. Expense Account available in Employee Purchase Order Information

3. Expense Account Rules defined in Purchasing using Item Category

4. An Expense Subinventory available to receive expense/inventory items