Pifba rotate but not stretch to full screen

[Luciano Silva]

I want to use a 4" vertical display and pifba is the best performance emulator for neogeo.
But I have a problem when I set the option "RotateScreen=1" loading screen is perfectly strectched to full screen but ingame is showing 4:3 and only on 30% of total screen.

This is my setup:

[Graphics]
DisplaySmoothStretch=1

Display Effect: 0 none, 1 scanlines

DisplayEffect=0
DisplayBorder=0
MaintainAspectRatio=0
RotateScreen=1