Personas 3.0: event onBeforeRefresh not working on GuiTableControl

Hello Personas experts

We have installed Personas 3.0 SP3 with latest notes.

I work on transaction VA01 and fill material and quantity into the sales item table.

After pushing ENTER and want to add some field (like ItCat/Plnt/StorLoc) with scripting before sending data to R/3.

Problem:

I find no possibility to come into scripting processing before data will send to application server.

Event onBeforeRefresh is not triggered if the cursor is in the sales item table when pushing ENTER

Also event onEnter is not triggered.

Have someone an idea, how I can solve this?

Thanks

Bernhard