Is the top-right window the playlist panel (panel_list.bmp) and do you want to toggle its visibility when a button is pressed? If so, that button needs to given index 25 in the main window's mask (mask_main.bmp).
I guess the bottom window is the info window playlist (info_head_list.bmp)? It looks like there may be an issue with the expansion areas in its mask (mask_info_list.bmp). If you post those 2 files, I'll take a look