No Sound

I am new with XBMC and
Windows 7 Ultimate

Installed Films (Icons/films, *** SOUND OK)

Installed Music, can see the all music icon/list, but NO SOUND
-----------------Encoder Lame,but Flac Vorbis/Wav also no sound.
----------------- PAplayer standard
------------------error message similar to "playlist cannot be played,check log."..I cannot find log.
----------------- all Music CDs in standard C:\Users\Name\Music

Installed Internet Music ,see all lot senders, *** with SOUND.!

Installed standard 2.0 speakers, analog output.

If I go (outside XBMC) to directories c:Users\Name\Music and click e.g. "Bach Concert" it is played with default [/u]Mediaplayer with SOUND.

Where is my XBMC sound ?? what is wrong ??

Thanks William