Pb mohaa: could'nt load opengl subsystem

Bonjour,
voila, je viens d'installer medal of honor allied assault sur mon ordi équipé d'une carte graphique Nvidia geforce fx 5700 LE.
et lorsque je le lance, il me donne ce message:
--- Common Initialization ---
Medal of Honor Allied Assault 1.00 win-x86 Jan 27 2002
----- FS_Startup -----
Current search path:
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak6Fr.pk3 (602 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak5.pk3 (259 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak4.pk3 (593 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak3.pk3 (669 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak2.pk3 (4722 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak1.pk3 (396 files)
D:\PROGRA~1\EAGAME~1\MOHDA\main\Pak0.pk3 (11174 files)
D:\PROGRA~1\EAGAME~1\MOHDA/main

----------------------
18415 files in pk3 files
execing default.cfg
execing menu.cfg
execing newconfig.cfg
Config: unnamedsoldier.cfg
execing configs/unnamedsoldier.cfg
execing safemode.cfg
couldn't exec localized.cfg
execing autoexec.cfg
Unknown command "fov"
couldn't exec custom.cfg
...detecting CPU, found AMD w/ 3DNow!

------- Input Initialization -------
Initializing DirectInput...
Couldn't set DI coop level
Falling back to Win32 mouse support...
------- Input Initialization Complete ------- 235
You are now setup for easy mode.
----- Client Initialization -----
Called FadeSound with: 0.000000
----- Initializing Renderer ----
----- R_Init -----
Initializing OpenGL subsystem
...initializing QGL
...calling LoadLibrary( 'D:\WINDOWS\system32\opengl32.dll' ): succeeded
...setting mode 3: 640 480 FS
...using colorsbits of 16
...calling CDS: ok
...registered window class
...created window@0,0 (640x480)
Initializing OpenGL driver
...getting DC: succeeded
...GLW_ChoosePFD( 16, 16, 0 )
...35 PFDs found
...GLW_ChoosePFD failed
...GLW_ChoosePFD( 16, 16, 0 )
...35 PFDs found
...GLW_ChoosePFD failed
...failed to find an appropriate PIXELFORMAT
...restoring display settings
...WARNING: could not set the given mode (3)
...shutting down QGL
...unloading OpenGL DLL
...assuming '3dfxvgl' is a standalone driver
...initializing QGL
...WARNING: missing Glide installation, assuming no 3Dfx available
...shutting down QGL
GLW_StartOpenGL() - could not load OpenGL subsystem
j'ai essayé d'installer plein de pilotes pour la carte graphique mais sans succès. j'attends votre aide avec impatience!!
merci d'avance