Cant connect from iTunes to airplay.

Question

Hi There,
I googled this for hours and still cannot get this to work..
My airport express is connected to a network created on another router, that connects to the web if thats of any consequence, So my express doesnt connect to the web, my express connects to the established network..
So I can see the speakers from itunes but cannot connect to them, not even with firewall switched off, ivp6 ininstalled and antivirus uninstalled.
Any thoughts?
Win7 btw
Cheers
AC

Answer 1

Also posted in iTunes won't play through Airport...: Apple Support Communities
  Some success. But Lion Server 10.7.3 is having trouble with the older g remotes now.
  After setting up a few things while talking with Clarke at Apple Server Support we had a Lion 10.7 compatible version of Server Admin 10.7 installed and could reach the server firewall. Short answer: had to turn it off to get the aiport express remotes to accept streams from the server.
  The new downside is that Airport Utility 6 can't deal with the older 802.11g airport express remotes. Further the server can't select them if they have been power cycled. The only way to get the server's copy of iTunes 10.5.3 to see the first two g remotes is to restart the whole server. Restarting iTunes isn't enough. Logging out and back in isn't enough. Haven't found a more surgical way to reconnect.
  Need to try to punch only the necessary holes in the server firewall and use it instead.
   I'd really love to see a very well documented description of the steps that iTunes goes through when connecting to airport express remotes with the differences when running on a server. ALL the steps, including handshaking and those high port numbers and just what keeps getting screwed up, like with the new 10.7.3 server update.