I can't hear shooting sound

i used CSS skins on gamebanana and applied it on Gmod13.
and when i joined TTT server, i couldn’t hear my shooting sound.
but strangely i can hear other players shooting sound.
is anyone know how to fix this?
ps.and some guns are stuck in belly
ps2.there might be many grammertic mistakes because i am korean

[editline]16th September 2013[/editline]

oh i think i wrote on wrong part
can anyone help me erase this writing?

(User was banned for this post ("wrong section" - postal))

CSS gun skins are now broken in Garry’s Mod. Just uninstall them.