Call of Duty 4 - Erreur

Bonjour,

J'ai un problème avec Call of Duty 4 comme beaucoup de personne...
Lorsque je lance le jeu, un mot d'erreur apparait : Fasfile for zone 'ui' is corrupt or unreadable

enderer ----
----- Client Initialization Complete -----
Attempting 44 kHz 16 bit [Windows default] sound
----- R_Init -----
Getting Direct3D 9 interface...
Pixel shader version is 3.0
Vertex shader version is 3.0
Shader model 2.0 code path is available.
Shader model 3.0 code path is available.
Using Shader model 3.0 code path because it is the best available path on this hardware.
Attempting 640 x 480 fullscreen with 32 bpp at 60 hz
Game window successfully created.
Using 2x anti-aliasing
Creating Direct3D device...
Com_TouchMemory: 0 msec. Using sum: 0
Loading fastfile code_post_gfx
Loading fastfile ui
Loading fastfile common
Initializing render targets...
Requested frame buffer to be 24-bit color with 8-bit alpha
DirectX returned a frame buffer that is 24-bit color with 8-bit alpha
Initializing static model cache...
Initializing dynamic buffers...
Initializing particle cloud buffer...
Creating Direct3D queries...
Setting initial state...
DirectX reports 128 MB of video memory and 190 MB of available texture memory.
Using video memory size to cap used texture memory at 112 MB.
Texture detail is set automatically.
Using picmip 1 on most textures, 1 on normal maps, and 3 on specular maps
Waited 23 msec for asset '$default' of type 'material'.
Waited 2 msec for asset '$additive' of type 'material'.
Waited 2 msec for asset 'shadowcookieoverlay' of type 'material'.
Waited 5010 msec for asset 'shadowcaster' of type 'material'.
Waited 2 msec for asset 'stencilshadow' of type 'material'.
Waited 4 msec for asset 'cinematic' of type 'material'.

------- sound system initialization -------
Loaded zone 'code_post_gfx'
Waited 36 msec for asset 'soundaliases/channels.def' of type 'rawfile'.
------- sound system successfully initialized -------
end $init 7152 ms
--- Common Initialization Complete ---

Fastfile for zone 'ui' is corrupt or unreadable.

Pouvez vous m'aider svp?

Cordialement =)