He won't be able to do it since plugin is trashed ^^.
First, use the latest version of Amxx, and the latest version of my plugin (the beta) only. Don't use another plugin in the same time. Next, make sure that all is properly installed et restart your server.
Now, if it happens again, paste here of what says the logs ( by default DEBUG is enabled so you should see some useful comments in logs/ ) and also paste your roundsound file.