my zombies script problem

[Mr.unpredictable.]

i was creating a anti tear gas and anti movtova script for a tdm map

i wanted it like zombies doesn't lose hp with moltova or they don't get affected by tear gas, but still there is problem can any one tell me whats wrong in my script?

  
addEventHandler ( "onClientPlayerDamage", localPlayer, 
    function (weaponID ) 
        if ( weaponID == 17,18 ) and ( getTeamName ( source ) == "zombies" ) then 
            cancelEvent ( ) 
        end 
    end 
) 

[Et-win]

if (( weaponID == 17) or (weaponID == 18 )) and ( getTeamName ( source ) == "zombies" )  

[Mr.unpredictable.]

if (( weaponID == 17) or (weaponID == 18 )) and ( getTeamName ( source ) == "zombies" )  

thanks

i will try it now