Originally posted by K.T.B.
That's unusual, it seems to be having trouble finding the samples from the original game - usually sample troubles come from people mis-placing the sample folders for the songs they insert.
Did you do anything to move or edit the folder that contains the default samples or TXTs that correspond to the music from the original SMW?
At first, it was the original separate music and samples folder. I would put a song in the samples folder, and AMKGUI would tell me that it's location is supposed to be "music\s\[songname]" So I changed the samples name to "s" put it in the music folder, and now it's giving me the error I mentioned above.