[ZPA] New ability for my nemesis

Just try below:

#include <amxmodx>
#include <fakemeta>
#include <zombie_plague_advance>

public plugin_init()
{
register_plugin("Nemesis Ability", "1.0", "zmd94")

register_forward(FM_CmdStart, "FwdCmdStart")
}

public FwdCmdStart(id, uc_handle)
{
   if(is_user_alive(id) && zp_get_user_nemesis(id))
{
static Button, OldButtons;
Button = get_uc(uc_handle, UC_Buttons);
OldButtons = pev(id, pev_oldbuttons);

if((Button & IN_USE) && !(OldButtons & IN_USE))
{
EarthQuake(id)
}
}
}  

public EarthQuake(id)
{
   new iPlayers[32], iPlayerCount, i, player
new Screen = get_user_msgid("ScreenShake")

get_players(iPlayers, iPlayerCount, "a")
for(i = 0; i < iPlayerCount; i++)
{
player = iPlayers[i]

if(zp_get_user_zombie(player) || zp_get_user_nemesis(player))
continue

message_begin(MSG_ONE, Screen,{0,0,0}, player)
write_short(255<< 14 )
write_short(10 << 14)
write_short(255<< 14)
message_end()
   }
}

it must work when im click on e but it not working im made someone nemesis in my server and it not working -_- 
im made same it and added  ZinoZack47 and not working too why ? ?? and no bugs in the plugin