its the sounds from the free bundle. I think they are .wav, I'm not sure how to go about providing source file ive uninstalled the r224 beta release and reinstalled but same issue. although when I load a project ive worked on before with the same sounds from the free bundle they work :/
I've just downloaded the free bundle from the link in the forum footer and imported all of the sounds at once into the Project/Sounds section successfully.
There is definitely nothing wrong with either C2 or the files.
Please explain exactly the process you are doing to import the sounds, and where you are importing them.