I tried to change the rollover color for my grids to something white. I did not have this color set before (in the jnlp). What I had set was the selection color which was yellow.
Now I set both, selectioncolor1/2 and rollovercolor1/2 in the starting jnlp and expect the rollover color to appear when I move the mouse over grid items (without clicking) and the selection color when I selected an entry by clicking the mouse button.
But it seems the rollover color killed my selection color (now it is grey). Could you check if the passing of the parameter is correct?