Tibia fecha sozinho em Windows Vista

O Error Report que parece quando eu abro o jogo novamente é:

Debug Assertion 8.50 NWin32Exception.cpp 50
Fri Jul 31 19:29:23 2009
Graphic Engine: DirectX9 (2)
Operating System: Windows Vista Ultimate Edition 32 Bit in BRA
Processor: AMD Phenom 8450 TRIP
Video Card: NVIDIA GeForce 9600 GT
Last Packet Types: 109 109 109 109 109 109 106 109 109 140
Last Packet: 109 093 126 228 125 006 001 093 126 227 125 006 000 000 000 000
Player Position: [32349,32222,7]
Player Name: Palladino Aang (Pacera)
Player Action: 055 052 046 053 046 050 050 048 046 050 048 054 058 055 049 055 049
Player.cpp 361: exception occurred, reason:
Player.cpp 465: exception occurred, reason:
Control.cpp 1716: exception occured (MessageType: 0 MaW: 2543FE8 MoW: 0), reason:
Control.cpp 1711: exception occurred, reason:
Control.cpp 383: exception occurred (Force?1:0 = 0), reason:
MainWindow.cpp 138: exception occurred (Surface = 1), reason:
GUI.cpp 1479: exception occured (Surface = 1), reason:
MapWindow.cpp 857: exception occurred (Surface = 1), reason:
MapWindow.cpp 810: exception occurred, reason:
Graphics.cpp 1365: exception occurred (Surface = 1) (fontNumber = 2), reason:
surfaceDX9.cpp 1353: exception occurred, reason:
surfaceDX9.cpp 1403: exception occurred, reason:
surfaceDX9.cpp 408: exception occurred, reason:
surfaceDX9.cpp 386: exception occurred (DebugProgress = 4) ((int) pBuffer = 56839840), reason:
NWin32Exception.cpp 50: win32 exception occurred, reason:
access violation (write attempt at 01E88004)


Alguém pode me dizer qual é o problema?? Já até formatei o PC e coloquei o Windows Vista Ultimate Edition 32bits de outro disco, mas o problema continua.
Não utilizo BOT nem qualquer tipo de coisa noob desse tipo.

Já entendi. Quer tiver o mesmo erro que eu, o problema está no DX9. Tente usar o DX5 (ruim, fica muito serrilhado) ou o OpenGL, que vai funcionar perfeitamente.