Is it possible to move an fx, that we spawned or not?

This script spawn the model and the fx but doesn't move the fx:

function move_fx()
{
level flag::wait_till( "initial_blackscreen_passed" );
struct1 = struct::get("struct1","targetname");
level.model = spawn( "script_model", struct1.origin );
level.model SetModel( "p7_skulls_bones_head_02" );
level._effect["bouledefeu"] = "Symbo/test3";
PlayLoopedFX(level._effect["bouledefeu"], 1, struct1.origin);
level.model enablelinkto();
level._effect["bouledefeu"] linkto(level.model);
fx_trigger = GetEnt("fx_trigger", "targetname");
fx_trigger waittill("trigger", player);
level.model moveY(-338,2);

}