If a particular mod doesn't work for you, you should contact the author of the mod via the mod's page comments.
In general, any mods only work in the moddable version of the game, so perhaps that is your problem?

sadly thats not the problem. EVERY mod does work,except the character models. i tried a lot of models from different authors and nothing works...i dunno y....

How exactly does it not work? You cannot chose the models in the options menu?

i CAN choose the models,the update is complete and installed,everything SHOULD work.i restart the game and every mod works,except the char model mods...

Are you trying to use them in Singleplayer or Multiplayer? Because character models only work in Multiplayer.

i just tried every multiplayer mode.nothing happens.or did i appear for the OTHER people in my team as 'deadpool' or anyone else?i mean that i see my character as the normal sam but the other can see the modded char?

No, you should appear as that model for yourself. Others will see you only if they too have that model installed. (Otherwise they see Sam.)
Does this work ok for you for built-in models?

ok,thats strange.before i installed different model packs i've seen other models in a deathmatch (like a huge black man with a pink suit,sam's with other clothes or female chars) o.o that was the point where i wanted to have that models too.and it was the regular game,not the moddable version.i'm a little confused,is it possible to activate some models with playing and succeeding in all levels?i'm sorry, i don't know what u mean with built-in models.

Those models you seen in not-moddable are the built-in models.

in this case,the built-in models work ok.