Sound alert don't work properly


Hey

First off, thanks for a good RSS software.

I've been looking for a RSS reader with sound alerts for some time now and when I found this one I got so exited. I've been using it for a day now and I've noticed that the sound alerts don't work every time. I've gotten about 10 news feeds today, and only 2 of them had sound alerting me.
How can I fix this?

I'm using:
FeedReader 3.12
Windows XP
Default browser: Firefox. Also using IE 6.0
I'm behind windows firewall

Would very much appreciate a response.