Try Multiplayer 3 JPCSPs on one PC

[onelight]

Yes, when flash0/kd/utility.prx is present, utility.prx and many other PRXs will be load.
That is the best compatibility way to play multiplayer.
Kingdom Hearts Birth by Sleep multiplayer only working on this way

OK, can you post log files for "Kingdom Hearts Birth by Sleep" with no flash0/kd/*.prx files present?

no utility.prx or no kd/*.prx get Connection lost
   

  no utility.prx-log1.txt.7z (Size: 207.2 KB / Downloads: 504)

  no utility.prx-log2.txt.7z (Size: 213.17 KB / Downloads: 502)


  no kd-prx-log1.7z (Size: 194.75 KB / Downloads: 487)

  no kd-prx-log2.7z (Size: 194.66 KB / Downloads: 583)


   

  proonline-log1.7z (Size: 186.54 KB / Downloads: 480)

  proonline-log2.7z (Size: 196.91 KB / Downloads: 488)


working when flash0/kd/*.prx files present
       

  utility-log1.7z (Size: 240.16 KB / Downloads: 472)

  utility-log2.7z (Size: 244.66 KB / Downloads: 492)