The tracks don't start playing when double-clicked on, instead they get enqueued as the next track in the Now Playing list

Ok, since my last try didn't get much response I'll have another try.

So, my problem is that the tracks don't start playing once you double-clicked them. It works fine with the first track after starting Songbird, but when I double-click another track it gets enqueued and is put as the next track to be played in the now playing list. The problem also appears when I want to listen to an whole album, earlier the whole album got enqueued when i started the first track but now it doesn't and instead I have to add all the tracks to the now playing list manually.

Some other information that may be helpful: I use version 1.2.0 which I believe is the latest version. I use Windows Vista. The problem appeared for abouth a month ago and before that I didn't have a single problem with Songbird.

I really hope that somebody got an idea about what is wrong since I don't want to give up on this great media player just yet.

Thanks in advance!