quote:
thanx .... but the built-in sound is working
Yeah, I've experienced that too. I guess at that time there was trouble uploading new sounds to the Plus sound server when you tried to send yours, and that's why it gave you the error message. The built-in sounds worked fine because they already exist on the server and don't need to be uploaded.
If you're interested, you're bound to find more info here:
Custom sound feature error report thread.