It's very strange... Opening the .cwb file I make sure "copy project audio" is checked. The WAV files go into my C:\Audio folder. Everything plays perfectly, and I save the file as a standard .CWP file in my C:\projects folder. But then when I close cakewalk and open a .CWP file back up the WAV files are just gone. Deleted from the Audio folder. So, the 2nd time around I opened a handful of .cwb files, saved them as .CWP files, and then copied the C:\Audio folder's contents to C;\Audioback. After I closed cakewalk (and cakewalk cleaned out my C:\Audio folder) I copied all of the wave files from C:\Audiobak into C:\Audio. Again, everything played fine, but when I closed cakewalk all the wav files out of C:\Audio were deleted again. As long as I keep copy and pasting the WAV files from C:\Audiobak into C:\Audio every time I use the program I can get it all to work.
I'm pretty sure that if you open a .CWB file and don't save it, then close it, Cakewalk will delete the WAV files it spat into it's audio folder. I feel like that's what it's doing here, although I AM saving the .CWB file as a .CWP file, so it shouldn't be happening.
It's just such a bizarre problem!