Built in audio previewer and libraries

I started collecting all my sample CDS with the amazing libraries feature of windows 7.
But I noticed that when you try to open an audio file from the libraries of windows 7 the built in audio previewer of Cubase 6 remains in silence. Is this a bug? Is there a solution?
Thanks in advance.

Article 75 in the Knowledge Base.

Article 75 is not the solution. I notice this problem only when audioning files from windows 7 libraries.
If the files are not in those libraries the audio preview works right.

anyone knows a solution pls?

You need to do it through Mediabay or set your soundcard for playback of Windows sounds. Why would you expect Cubase to play them back?