Audacity shuts down YouTube

I want to record the sound from a YouTube video using Audacity. I have done this previously with no problems. After starting the YouTube video, I then launch Audacity. The second I do that the YouTube video stops dead in its tracks. Is this a problem with YouTube or Audacity, how do I fix it? I have uninstalled Audacity then reinstalled it. This didn’t help. I am using version 2.0.5 on Windows XP.

Problem solved. I uninstalled version 2.0.5 and installed version 2.0.0, which I will keep, since version 2.0.5 obviously has some serious problems.