UI: Refresh combobox data on form (after change data in database)

Hello!

I have two userfields which include extra amount added to price. When the user change the price in purchase-pricelist (item master data), i change the price in the sales-pricelists (SDK-DI Items_Prices). But the update is not visible on screen. After skip to next record and then back to the previous record, it is ok.

I try form.refresh, form.update, item.refresh and item.update - no effect.

Any idea?