Hello there. First of all, my girlfriend told me that the same thing happened to her when she was using DVD Video Soft Free YouTube to MP3 converter, but I didn't believe her. I thought she was just being to impatient, she tends to do that a lot. But anyway, she was using JAWS Version 12, and she was complaining about the same thing!
There are many other ways to get an mp3 file from youtube though. There is a sight,
http://www.video2mp3.net
that allows you to enter the url of a YouTube video, then it converts it. Then, after some time, the link to download the .mp3 file comes up, click it, then save your .mp3 file onto your system. There are other sights as well that do the same thing. For example, http://www.convertfiles.com does the same thing.
But if your looking for a downloadable program that does this, you can download the youtube downloader. Go to www.downloadtoolz.com and download the youtube video downloader. The downside to this program is that you have to pay to convert more than one file at a time. Other than that, I think it works beautifully.
Hope this helps.