event is not added serverside

[Drakath]

ERROR: Client (username) triggered serverside event onGUIPrivateMessage, but event is not added serverside

addEvent("onGUIPrivateMessage", true) 
addEventHandler("onGUIPrivateMessage", getRootElement(),  
    function(toplayer, text) 
        triggerClientEvent(toplayer, "onPrivateChatSent", source, source, text) 
    end 
) 

I added the event. Why does it say that it is not added?

[Karuzo]

How are you triggering onGUIPrivateMesage ?

[Drakath]

triggerServerEvent("onGUIPrivateMessage", getLocalPlayer(), ply,newText)

[Citizen]

The event is not added because you have an error in this script file so it couldn't be loaded or because you didn't add this script in the meta.xml