Wave files mute..

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So I just opened my project which contains some wave files that I recorded myself and it's all mute now. None of the wave samples make any sound now? I've just worked on the project yesterday and there was no problem, everything was playing. Now, as I said, everything is mute. Windows won't play them either. So if I can't fix this, the project is kind of ruined..

Update:
Luckily, I found an earlier backup with the tracks working. I guess there was a problem when I exported the sound from LMMS.
AntsInThePants wrote: Luckily, I found an earlier backup with the tracks working. I guess there was a problem when I exported the sound from LMMS.
Makes no sense, if it did play earlier, the only reason for this to happen is that you have moved or renamed samples, but when a project cant find its references, there is still a method that can be used:
Look at your AFP
Image
See that line where it here says aether.wav?
That is the actual file that is used by this AFP, and that string is preserved, even if the sample is moved! In the picture you only see a name, but in a real project, you will se a complete path. All you have to do is locate the moved sample, and put it back where it belong.