Returning to P99, patch V40 files not working. (crash after selecting server)

[ChuzzleeHUN]

Hello,
I've been playing for a while in July-August, but didn't get into the game that much (important: the game worked fine back then!). Time passed, I tried out newer MMOs, older MMOs, etc. Like a week ago, i decided to play on the server again, so I downloaded Titanium, installed it, replaced the files (deleted the arena.eqg, etc.). I started the game, logged in, and after i selected the server, the game just crashed. I don't know why, the V39 files worked.
I have no antivirus installed, im using XP (if that's the problem, i'll upgrade to 7 [You must be logged in to view images. Log in or Register.] ), a well-aged computer (Asus a7n8x-x, AMD sempron 2200+, ATI radeon 9550/x1050 128mb, 2GB DDR400 RAM), but like i said, i played on the server with this comp.
I figured that out, i can play on any server except P99 (blue and red both), and if i don't change the dsetup.dll, i can get into the server, but i get the error message to update my spell files.
I don't know if it affects this, but in September I installed the retail, F2P version of EQ, but uninstalled it later.

I hope that you guys can help, thanks for all answers!
Best regards, Chuzzlee.