Custom Sounds causing crashes on servers

I run a modded server, and I've added my custom mod to the server.

The mod includes a few statues, all of which have custom sounds to them. However, whenever you place a statue, it causes all other players nearby to crash. The player who places it is fine, but everyone else crashes.

What can I do?

Here's the image of the crash screen.

(Also a link, in case the embedded picture doesn't work.)