Order of columns of table

Hi,

I added three columns at my table from a dictionary structure and in this structure this fields are at the end, but in my WDA I have to show this columns corrisponding at this fields in different order. So, I binded this fields from the structure and I move the columns up or down depending of the position. But when I go to show my WDA I see always this columns at the end... Is there a different method to fix the position of the columns?

Tks a lot...