The Black line. "render_3d_window=0" doesnt work

In the PSS concorde i have the annoying black line at the bottom of my screen. i went to panel.cfg and did the fix, but it didnt work. is there another solution?
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=21&t=63218