So I'm trying to add some mp3's to my MM library and when I choose the file and click "add" it seems like the software is adding the file but it doesn't show up in my song list. It only does that to certain mp3's. I've tested those files in other audio programs and they work fine. I've tried re-naming the files, relaunching MM and nothing works.

I'm using MM Fusion for Mac btw.

Any help would be appreciated. Thanks!

MixMeister will not work with DRM'd files; could that be the issue with the tracks you describe?

I checked to see if they were DRM'd but I was unable to verify. However, I converted them to AAC format and it worked.