Kingdom Hearts: Birth by Sleep - US - ULUS10505

[Zekro]

Try this:
Go to the bat file,right click and edit,go to this line
"%JAVA_HOME%\bin\java" -Xmx1024m -XX:MaxPermSize=128m -XX:ReservedCodeCacheSize=64m -Djava.library.path=lib/windows-x86 -jar bin/jpcsp.jar %*

Edit the -XX:MaxPermSize=128m changing the 128,try with 256 or higher
Also if it doesn't work try editing the codecachesize
Hope it helps