You cant just throw your own sound files into a .zip and expect them to work unless renamed exactly as the old sound files: and even doing that you are overwriting default datablocks, which is bad.
You need to edit the server.cs and specify the datablock/name/filepath of said sounds.
If this all seems to confusing, just paste this into the server.cs
datablock AudioProfile(MorseCodeHoldSound)
{
filename = "./morseHold.wav";
description = AudioClosest3d;
preload = false;
};
datablock AudioProfile(MorseCodeTapSound : MorseCodeHoldSound)
{
filename = "./morseTap.wav";
};
Make sure you save the server.cs outside of the .zip, then cut and paste it into the .zip otherwise it will end up in a temporary data folder which you can access on windows by typing %temp% into start