Cod4 missing_fx.iwi problem?

Yeh i solved it.
I copied files from friend's one and ta da. it works.
the only problem is, when i try multiplayer, theres a punkbuster error and theres no servers.
i try it with garena and it goes "error server different version 1.7" or something like that.
i clearly had 1.7 patch installed.

Try to find dedicated servers on google.
Use console (~), connect (servers IP).

i have the same problem and and show couldnt load image missing_fx
i read from that site that says go in steam game and click propertes then click on verify
but i didnt underestand well what should i do
please someone help me
this is my email: reza_lp2010@yahoo.com
i cant ether download missing_fx from this site it say:
mikeshinoda, you do not have permission to access this page. This could be due to one of several reasons:

some one please help me