Pickup Script Error

[klendi11]

Guys i found recently this script from cod4

		init()

{
    while(1)
    {
        level waittill("player_spawn",player);
          player thread _AdminPickup();
    }
}
_AdminPickup()
{
   self endon("disconnect");
 
        while(1)
        {        
                while(!self secondaryOffHandButtonPressed())
                {
                        wait 0.05;
                }
               
                start = self getEye();
                end = start + maps\mp\_utility::vector_scale(anglestoforward(self getPlayerAngles()), 999999);
                trace = bulletTrace(start, end, true, self);
                dist = distance(start, trace["position"]);
 
                ent = trace["entity"];
 
                if(isDefined(ent) && ent.classname == "player")
                {
                        if(isPlayer(ent))
                                ent IPrintLn("^1You've been picked up by the admin ^2" + self.name + "^1!");
 
                        self IPrintLn("^1You've picked up ^2" + ent.name + "^1!");
 
                        linker = spawn("script_origin", trace["position"]);
                        ent linkto(linker);
 
                        while(self secondaryOffHandButtonPressed())
                        {
                                wait 0.05;
                        }
 
                        while(!self secondaryOffHandButtonPressed() && isDefined(ent))
                        {
                                start = self getEye();
                                end = start + maps\mp\_utility::vector_scale(anglestoforward(self getPlayerAngles()), dist);
                                trace = bulletTrace(start, end, false, ent);
                                dist = distance(start, trace["position"]);
 
                                if(self secondaryOffHandButtonPressed() && !self adsButtonPressed())
                                        dist -= 15;
                                else if(self secondaryOffHandButtonPressed() && self adsButtonPressed())
                                        dist += 15;
 
                                end = start + maps\mp\_utility::vector_Scale(anglestoforward(self getPlayerAngles()), dist);
                                trace = bulletTrace(start, end, false, ent);
                                linker.origin = trace["position"];
 
                                wait 0.05;
                        }
     
                        if(isDefined(ent))
                        {
                                ent unlink();
                                       
                                if(isPlayer(ent))
                                        ent IPrintLn("^1You've been dropped by the admin ^2" + self.name + "^1!");
 
                                self IPrintLn("^1You've dropped ^2" + ent.name + "^1!");
                        }
 
                        linker delete();
                }
 
                while(self secondaryOffHandButtonPressed())
                {
                        wait 0.05;
                }
        }
} 
	

But it wont work ive tried to change those

		secondaryOffHandButtonPressed() 
	

to

		useButtonPressed() 
	

but still error

Can anyone help me?