Left 4 dead 2 shiny weapons problem!

For some reason when i downloaded the left 4 dead 2 modified weapons the left 4 dead 1 weapons were fine but the left 4 dead 2 weapons were so shiny they had no texture at all. This is a problem because I like posing with these guns. My ingame specs are:

model detail high
texture detail very high
shader detail high
reflect all
medium shadows
color correction on
no AA
anisotropic 2x
vsync on
no motion blur
90 FOV
full HDR
DirectX v9.0

My PC specs are:

AMD Turion 64 X2 mobile technology TL-60 2.00GHz 128mb
2GB of ram
32 bit OS windows 7 ultimate
Dell inspiron 1501 laptop