Why get this error

[Monsthers]

Hello, I have this script which get an error that an event was not added ! but if added , I test this script local windows server and runs perfect, I try linux host and fails

        triggerClientEvent(player, "onSpawnSuccessful", getRootElement()) 
    else 
        triggerClientEvent(player, "onSpawnError", getRootElement() , "You Dont Have permission To Spawn As " .. skinName .. "") 
    end 
end 
  
addEvent("onPlayerSpawnButton", true) 
addEventHandler("onPlayerSpawnButton", getRootElement(), playerSpawn) 
  

Here the error!

http://imgur.com/8nu49ax

[Walid]

you need to check if the client is ready or not example:

client side:

addEventHandler("onClientResourceStart",resourceRoot, 
function() 
    triggerServerEvent( "clientReady", resourceRoot ) 
end 
) 

server side:

addEvent("clientReady", true ) 
addEventHandler("clientReady",resourceRoot, 
function() 
    -- your code here  
end 
)