he asked which site you got it from. if it's not from orphis's buildbot, this forum's live downloads or the jpcsp site you could've get a malware-infested version or version with missing parts.
to be safe, if you didn't get off of it before, try getting the newest version off the buildbot. your error sounds like the jpcsp you have is missing the lwjgl library.
http://buildbot.orphis.net/jpcsp/index.php
to be safe, if you didn't get off of it before, try getting the newest version off the buildbot. your error sounds like the jpcsp you have is missing the lwjgl library.
http://buildbot.orphis.net/jpcsp/index.php