How do i spawn in effects?

[M8T]

Im trying to add a thermal charge effect yet nothing happens
Function.Call(Hash.REQUEST_NAMED_PTFX_ASSET, "scr_ornate_heist");
if (Function.Call<bool>(Hash.HAS_NAMED_PTFX_ASSET_LOADED, "scr_ornate_heist"))
{
thermitefx = Function.Call<int>(Hash.START_PARTICLE_FX_LOOPED_AT_COORD, "scr_heist_ornate_thermal_burn", -1.9623f, -674.7261f, 16.5811f);

Any ideas?