[rudedog]

You siad this was happening on the server. You do not need to run any sound mods on your dedicated server.

Only the clients need to run them. The only custom pk3 files you shoud run on the server are:

maps
map fixes
skins ( so your players can see what skins others are wearing if you allow this)
game play mods ( realism or non-realism mods )

I would not add sound mods unless this box shares the computer and MOH with a client.

But to me it sounds like a sound mod running in dedicated mode casuing your problem