Work in Editor but not in Built

Hey Guys i made a spawnscript wich works fine in editor but when i build webplayer fo example it dosent work can you plss help me thanks in advance

my Code:

 var enemy : Transform;    
 var amountEnemies = 5;
 var lvl = 1;
 static var multiplicator = 3;
 var speedmult = 0;
 
 function Update()
 {
     speedmult = multiplicator;
     multiplicator = 2 + Time.time * 0.01;
     if(GameObject.Find("Enemy(Clone)") == false && Time.time > 5)
     {
         Invoke("Up",0);
         amountEnemies += 5;
         lvl += 1;
     }
     else
     {
         CancelInvoke();
     }
 }
 
 function Up()
 {
     for(i=0;i<amountEnemies;i++)
     {
         var pos=Vector3(Random.Range(11.33826,79),40,Random.Range(26.96444,26.96444));
         Instantiate(enemy,pos,transform.rotation);
     }
 }