Can not import WAV files with DP-24SD

[Kail]

I've done it in the past, with no problem, but now they won't load. I copied the wav into audio depot, making sure it was named with single byte alphanumeric characters. I disconnect, Scroll up audio depot, fine the file.. but when I click import it says "Can not import" that's it. No reason given. I've tried loading it a few times, renaming it, but no go. I created a new song, and tried to load it into it, but it won't. Any suggestions?

 

[Kail]

I've tried changing the bit rate I save WAVs at in Audacity, and changing the rate of the song when I create it. Still no go.