i made everything fine ! (.ff's into zone/dlc and .iwd's into /main) but when i join a terminal server it shows error ''could not load terminal loadscreen.....ff. help pls

Then download it again, as in redownload it from Steam.

or MW3 dedicated server tool

I remember that you need a modifity iwd file that suport terminal, but i dont have the link bro

Terminal is a free map. You can get it's files (.FFs and .IWDs) by checking the game integrity by any means.