Devexpress pivotgirid字段自定义表单

I have a button on ribbon control.When I click it I open a customization form which shows pivotgrid's fields and I drag items from customization form to the pivot grid but when I close and reclick the button to open the customization form the draged fields are not shown in the pivot.I have to reselect the fields to show on the pivot.I have a button on ribbon control.When I click