Kingdom Hearts Birth By Sleep Graphic bug

[Kamikaz]

Hey there ! (sry for bad english, not my native language :p)

I managed to run KHBBS on jpcsp using various tutorials on youtube/forums.
Game is running great, 30 fps no framedrops but i have a graphic bug : the game is showing like 2 screens one stacked on the other one.
Here is a screenshot of my problem :

http://www.hostingpics.net/viewer.php?id...5KHBBS.png

as u can see the game is quite pretty =)

My computer :
MSI laptop GE-70
CPU : Intel® Core™ i5-3230M (2,60 GHz)
GPU : NVIDIA® GeForce™ GTX 660M
RAM : 8GB

Options in jpcsp :
-VIDEO
Only GE graphics
USe bertex cache
Use shaders
Use a Geometry Shader for 2D rendering
Disable UBO
Enable VAO
Enable saving GE screen to textures insead of memory
Enable decoding of indexed textures

-Memory Both checked

-Misc
Use Media Engine
Decode audio files with SonicStage

-Compiler
Use compiler (dynarec)
50 maximum method size

-Display
Antialiasing x8
Resolution 1920x1080

"%JAVA_CMD%" -Xmx2512m -Xss100m -XX:MaxPermSize=512m -XX:ReservedCodeCacheSize=512m -Djava.library.path=lib/windows-amd64 -jar bin/jpcsp.jar %* (edit from the start-windows-amd64 file)

Please ! Help !