when i frist dled it
it worked fine no problems for a few launches
then it just stopped launching saying it was encrypted any ideas how to fix it
same thing happened to me
First of all, I believe Persona 3 has been moved to the playable section (why this part of the Commercial Games section is still here I don't know since JPCSP is able to decrypt on its own now), secondly, JPCSP staff does not support pirates. If you decrypted your game legally you shouldn't experience this problem.
If you own the game and did decrypt it by yourself and you still receive this error (but you really shouldn't), then this is an issue with JPCSP. If you fulfill these critera (doubtful since you downloaded it from the internet), then you can come back here and post a log file and the staff will help you.