Hello, people. I'm new here

I don't know about Pawn scripting very much, so please understand if this isn't very much of what to be asked.
I tried to fix the code of 'Glow All In One' by Zenith77,
(Link here :
https://forums.alliedmods.net/showth...71724?p=171724)
To make it work properly in Sven Co-op.
I tried this plugin in Sven Co-op and checked that glowing and streaming work well, but nade glowing just doesn't work.
So I opened up the code, and looked up these two:
Code:
register_event("SendAudio","eventGrenade","bc","2=%!MRAD_FIREINHOLE")
and
Code:
public eventGrenade(id) {
if( g_GlowNadeColor[id] != GLOW_NULL )
{
set_task(0.1, "makeNadeGlow", id )
}
}
public makeNadeGlow(id) {
new grenade
grenade = get_grenade(id)
if( grenade ) {
set_rendering(grenade, kRenderFxGlowShell, g_GlowNadeCustomColor[id][0],
g_GlowNadeCustomColor[id][1], g_GlowNadeCustomColor[id][2],
kRenderNormal, 150 )
}
}
I don't really get all of what these things are saying, but it pretty looks like Half Life(or Sven Co-op) doesn't understand the registered event above.
I searched through the forum for about 20 minutes and just couldn't find the answer.
The question is :
How can I make 'Half Life' detect players' grenade and make it glow?
Thank you for reading this.