Sio I got my first Android phone and decided that I would need a custom notification-sound. I put it in E:\media\audio\notifications and it does show up when choosing notification sound.
Now after some time it suddenly wont play an example of it when selected, and in sound settings it just shows "Unknown" below Notificationtone.

Phone: Xperia Active ST17i (but from what I can gather, the inside is the same as Xperia Mini.)
Android version: 4.0.4
Can't remember the rest of the udefull numbers to post nor the thread it which I found them.

Thanks for any help.