Big problem with Table Control and single column selection

Dear all

I have on a dynpro a Table Control where i set Column Sel. to 'Single' and w/SelColumn I attach to my field

My Table control shows 10 lines.

The swich of columns by clicking on the selection column works well as soon I do not have more thant 10 lines in my table and I do not have to scroll.

When for ex. I mark the 1st line and then I scroll down until my 1st line is not shown anymore, and then i select another line, the 1st line remains marked. When I scroll up, I see that then both lines are marked!!!!

Who can help?

Herbert