How to have PXSelector show default value?

This is a follow up to this one: 

How do I make my default value for my second UOM selector appear in the selector on page load?

Here’s my DAC declaration. I also used the strategy in the referenced link to set the values for the selector dropdown on load.

I added this to try to get the default value to display...but it didn’t work:         

[PXUIField(DisplayName = "jUOM", Visibility = PXUIVisibility.SelectorVisible)]

I also tried a few other things that didn’t work. Any thoughts on how to get a Default value to appear in the Selector at load?

This part of the below referenced DAC should load the default, I think, but it doesn’t work…

        [PXDefault(typeof(Search<InventoryItem.salesUnit, Where<InventoryItem.inventoryID, Equal<Current<SOLine.inventoryID>>>>), PersistingCheck = PXPersistingCheck.Nothing)]

        #region juOM
        public abstract class juOM : PX.Data.BQL.BqlString.Field<juOM> { }
        protected String _jUOM;
        [INUnit(typeof(SOLine.inventoryID), DisplayName = "jUOM")]
        [PXUIField(DisplayName = "jUOM", Visibility = PXUIVisibility.SelectorVisible)]
        [PXDefault(typeof(Search<InventoryItem.salesUnit, Where<InventoryItem.inventoryID, Equal<Current<SOLine.inventoryID>>>>), PersistingCheck = PXPersistingCheck.Nothing)]

        public virtual String jUOM
        {
            get
            {
                return this._jUOM;
            }
            set
            {
                this._jUOM = value;
            }
            #endregion
        }