doom3 is messed up

i installed doom 3, and it installed beautifully, or so i thought. i tried to run it and got this error

2793 MHz Intel CPU with MMX & SSE & SSE2
512 MB System Memory
128 MB Video Memory
Winsock Initialized

doom using MMX & SSE & SSE2 for SIMD processing
enabled Flush-To-Zero mode
enabled Denormals-Are-Zero mode
------ Initializing File System ------
Current search path:
C:\Program Files\Doom 3/base
C:\Program Files\Doom 3\base\pak004.pk4 (5137 files)
C:\Program Files\Doom 3\base\pak003.pk4 (4676 files)
C:\Program Files\Doom 3\base\pak002.pk4 (6120 files)
C:\Program Files\Doom 3\base\pak001.pk4 (8972 files)
C:\Program Files\Doom 3\base\pak000.pk4 (2698 files)
C:\Program Files\Doom 3\base\game00.pk4 (2 files)
game DLL: 0x0 in pak: 0x0
file system initialized.
--------------------------------------
----- Initializing Decls -----
------------------------------
------- Initializing renderSystem --------
using ARB renderSystem
renderSystem initialized.
--------------------------------------
4966 strings read from strings/english.lang
********************
ERROR: LoadTGA( textures/bigchars.tga ): Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported

********************
idRenderSystem::Shutdown()
Shutting down OpenGL subsystem
...shutting down QGL
LoadTGA( textures/bigchars.tga ): Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported

Shutting down OpenGL subsystem
...shutting down QGL

i have no clue what all this means, can someone help me out, thanks in advance