Linking sound keyword to a weapon

[jangove]

I'm trying to create a patch that will alter the firing sound of a weapon. I would swear, up and down, that I've done everything right, but I cannot get the sound to link to the weapon correctly. I am trying to do this without editing the original mods esp (so in essence I'm trying to create a mod of a mod). Is this just not possible? Is the only way to alter this weapon sound to edit the original .esp? That seems very strange to me.

 

EDIT: Stupidest damned thing in the world. I had forgotten I had another patch that was over-riding the same record, and so shutting out my change.