crossdomain policy on subdomain

[unitymatrix]

I set my unity3d demo at XXX.mydomain.com,and I put crossdomain.xml file in position XXX.mydomain.XXX/ crossdomain.xml
while there are still broad error below:

On Connection callback got: False (error : <General exception on connection: Unable to connect, as no valid crossdomain policy was found at System.Net.Sockets.Socket.Connect_internal (IntPtr sock, System.Net.SocketAddress sa, System.Int32 error, Boolean requireSocketPolicyFile) [0x00000] in :0
at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP, Boolean requireSocketPolicy) [0x00000] in :0
at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x00000] in :0
at System.Net.Sockets.Socket.Connect (System.Net.IPAddress address, Int32 port) [0x00000] in :0
at Sfs2X.Core.Sockets.TCPSocketLayer.ConnectThread () [0x00000] in :0 >)
UnityEngine.Debug:Log(Object)

the crossdomain.xml file like this :

the subdomain site is not at the same server with the topdomain server.
mydomain.com point to one site, XXX.mydomain.com point to another with different server machine

anyhelp will be appreciated

[gfoot]

It sounds like you’re trying to server the crossdomain policy from your web server, but socket-based crossdomain policies must be served by a special server, usually on port 843.

See the documentation: http://docs.unity3d.com/Documentation/Manual/SecuritySandbox.html