Custom Chat Sounds (DarkRP 2.4.3

[Dog's Pajamas]

I'm trying to use a custom sound to replace the "yeah" sound in chatsounds.lua
I've placed the audio file in resource/sounds/(file_name.wav)
I've also included this in the resource file I made "resource.AddFile( "resource/sounds/ah_yes.wav" )"

Yet, same result "Failed to load sound "resource\sounds\ah_yes.wav", file probably missing from disk/repository"

Here's how I set it up in chatsounds.lua

sounds[ "yeah" ] = { "resource/sounds/ah_yes.wav" }
sounds[ "yes" ] = sounds[ "yeah" ]

Any help is appreciated!