I have installed the new Windows Media Player 11, because some of the
CNN-Stream-Videos on the official CNN-homepage need the new player.

A long time later, when I watched videos, suddenly a few of them had no
longer sound. If I watch Windows Media Player-videofiles in the internet,
they have no sound!

Even on my already saved videos on my laptop there are much videos, which
have suddenly no more sound!

But when I watch all these videos with other players (Media Player Classic,
Windows Movie Maker, IrfanView), then they have sound!

My speculation is, the reason for the problem could be an action, that I
have made in the last weekend. I have put the laptop to the TV-machine via a
cable called VideoGrabber (USB and one cable for the sound-recording). I have
recorded TV-stuff with the Windows Movie Maker. A little bit later I had this
problems with the WMP 11. But I am not sure, if this is the reason for the
problem.

I had this problem once before. I uninstalled the WMP 11 (a rollback to the
version number 9). Then all videos had sound, when I watched them with the
earlier version of the Windows Media Player. But: They was played too fast!
Then I installed the Windows Media Player 11 again. After that, everything
was allright. But this time, this way does not work to heal my player.

Could be there problems with the Audio-Codecs? Or Audio-Settings? I think,
there is can not be a problem with the audio-settings, because all videos
work with other players. Only with the Windows Media Player there are
problemes with a few videos. They does have not sound, but they should.

What would you do? A saved videos does work with every player (and have
sound), but it has no sound with the Windows Media Player.

Here are three examples. Normally there is sound, if you watch the
Stream-Videos from this thee news-homepages. But if I watch them now with my
WMP 11, there is no sound!
http://www.tagesschau.de/sendungen/0,,OID6348040_V [...] V_,00.html
http://www.cnn.com/video/player/player.html?url=/v [...] fender.cnn
http://www.zdf.de/ZDFmediathek/inhalt/20/0,4070,39 [...] sl,00.html

When I download them and watch them with IrfanView, Media Player Classic or
inside the Windows Movie Maker, then they have sound!

But not with the Windows Media Player.

What should I do?