Wi fi TV access to pc blocked by 360

Hi,

Something has changed in a recent 360 upgrade, my Sony internet TV can no longer log-on to my pc to access music files, the TV says it cannot access the server.

Other services such as BBC Iplayer work fine over the wi-fi network.

If I disable Smart Firewall then the TV can see the PC and access the music.

I don't know where to look or waht to change.

Help Please.

Dave.