Some help with this script?

[zell12]

Well, This script was tested on Graal2001 by Rabid, and he says it works perfect there. But on Frolic, it wont.
It is supposed to warp the player to a level if they have below 20hp, but it won't work
Can someone see whats wrong and post a working script.

NPC Code:

---

if (playerenters || timeout) {

   if (strtofloat(#s(clientr.hp))<=20) {

      setlevel2 worldl-17.nw,27.5,29;

   }

---