Stuck in loop windows media player

Hi
When i open Windows Media Player--Error--Media sharing is currently
disabled,Either because the sharing service is not running or your Firewall
settings have changed. To restart sharing, you must first confirm your
sharing settings.

i (click) ok

Then when i go into Library--Media Sharing-- I am returned to the above
error ?

Any one help I am trying to stream music four days now and canot see the end
of the tunnell. I must be doing somthing wrong or missing somthing (No
coments)

Thanks for ANY help