FS2004 Custom Sound File Won't Play In FS2004

I tried to replace the startup sound on the default Lear45, and for some reason the sound will not play. I made it with audacity and saved it as a 16 bit audio file, same as the others. Is there something I am missing? I have always wanted to create sound files, but for some reason none of them play.

Maybe the volume of the sound file is not high enough. Because if you say that you saved it as 16bit and you just replaced the files when they have the same name and the same format, it has to work.
Make sure that the file has the same name and the format *.wav.
If it still not work, try maybe increase the volume of the sound file itself.
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