Hey @KoooT333! Welcome to the forums!
Unfortunately you’re not likely to get much help with just this. We’re going to need more information, this is much too broad. Could you reply back with things like:
What file type the original and the replacement are (.wav is standard)
Are the sounds part of a CUE file?
Can you supply any screenshots of your changes?
The more details you have, the better chance of getting a fix! 