Hi Arnie.The problem is that those are very old WavPack encodings (2003!) and back then WavPack files retained the RIFF header from the original WAV file at the beginning of the file. This caused some programs (like CEP in some cases) to interpret the file as a WAV file before even allowing the WavPack plugin to have a shot at it. I tried these with CE2000 and it worked, but unfortunately I don’t have my PC with Audition anymore. I do remember that there were workarounds for this, but the only one I can think of now (at 5am) is to temporarily move the wavepcm.flt file in CEP's program file folder somewhere so that it won’t be used.Alternatively, you can drop the files into the wvunpack.exe program to convert them into WAVs, which will work fine with CEP. Or convert them with Foobar2000.Sorry you’re having trouble...WavPack is just supposed to work!