Produmex Scan - set active field on form load

I'm trying to set active field on TransferStocksScreen on form load with this select:

SELECT 'TextItem' AS Click$

Saved it as BXMobileWH9_TransferStocksScreen_Activate also BXMobileWH9_TransferStocksScreen_Load, but can't make it working. Am i doing something wrong?

Produmex Scan version 19.1