Text Guage Hex Display Format for Bound List Item

I am trying to display a hex value in a Text Guage GUI object. The Text Guage has a dummy variable linked to Data-Variable and has a List Binding to a List item. In a Decimal Display Format, the value changes with the List Item change (though it is always a negative integer). I would like to display the Hex format of the List Item value, but when I set the Text Guage to the Hex Display Format it only displays the value of the Data-Variable and does not change with the List Item value. 

 Product: UV1100-PT

Software: PowerVision Studio v.2.9.23029

Thanks,

Jared