Help! Cannot see mp3 audio files

[ry75]

I am using DVD PictureShow 2 with Windows XP. After I have created a slideshow and added several mp3 files for audio, I went back to change the music and add a different mp3 file. However, now I cannot see the mp3 files. If I click on the folder where they are located, it appears empty and I cannot add additional music. However, I know the files are there because I can see them through regular windows explorer. I rebooted my pc and I still have the same problem. I even tried creating a new slide show and added a few pics and then attempted to add a mp3 file, but cannot see them. Any have this problem and have a solution?