Explorer filedoubleclick does´nt enqueue

[Frants]

Hi! If I double click on a .mp3 file in explorer, the file won´t be enqueued, it will be opened by winamp, and the filelist will be gone.

I have the option "Enqueue files on double click in Windows Explorer (defalut is unchecked)" checked! And it works good with .avi, .wmv, .wma and so on, but not with .mp3! Why?

Winamp 5.21 Pro.