Avahi with itunes music sharing over vpn

[baxtr]

I have the Avahi package running over openvpn with two pfsense boxes.  Everything works great except itunes music sharing.  All other Apple bonjour services work great across the vpn.  However, itunes sharing doesn't seem to work, itunes will see the remote music library but simply fails to load the library.  The iphone remote also experiences the same problem.  Does anyone have a fix for this, or something that needs to be changed in the Avahi config to get this working.