Preloads doesnt really work :S

[neocrawler]

Heey everyone,
I was kinda getting ennoyed that preloads doesnt really work.
Proberly I do it wrong heres and example how I do it.

AddEntityCollideCallback("Player", "ScriptArea_4", "Collide_ScriptArea_4", true, 1);

void Collide_ScriptArea_4(string &in asParent, string &in asChild, int alState)
{
PreloadParticleSystem("ps_break_wood.ps");
}