NIS 2010 and media sharing

Everytime I upgrade to a new NIS its a nightmare for sharing my media files. I don't understand why such a popular service is always blocked more than actual viruses/attacks.

I use Windows Media Player 11's media sharing every day and if I can't get NIS 2010 to work I will have to go another way.

After looking around the forums for a solution and trying everything possible I am almost ready to give up. Have tried setting the exes to ALLOW and nothing and also setting FULL TRUST to my devices and also nothing. 

Is there an actual fix for this?