SMART Forecast update

I am trying to run an Sync from SMART Forecasting and get it to update a UD Field in the Forecast table. I am able to get this working fine from a manual import where it uses the Forecast.ImportForecasts Business Object. But when I try to trace or run a Forecast Sync from SMART it does not show any BOs being utilized.

Has anyone had any experience with synchronizing a data field upon an Import from SMART?