socket and crossdomain problem (Security.PrefetchSocketPolicy )

In testing, i got a error about corssdomain.

If each server's ip address is different....
If i call 'Security.PrefetchSocketPolicy', webplayer talk to me...
SecurityException: Unable to connect, as no valid crossdomain policy was found

my crossdomain policy ...

<cross-domain-policy> <allow-access-from domain="*" to-ports="*"/> </cross-domain-policy>

I made 'socket server' as follows... (client unity is webplayer version)

1) Policy-server : If unity API call policy, will send crossdomain plicy.
2) Login-server : check users login
3) Lobby-server : make room, play game

• TEST 1

1. All servers located on same IP address (111.111.111.111)
   

2. load unity webplayer

3. API call 'Security.PrefetchSocketPolicy( 111.111.111.111, port)' to connect Login-server

4. Policy-server send policy packet.

5. connect Login-server and then... check login

6. And then... move Lobby-server

7. API call 'Security.PrefetchSocketPolicy( 111.111.111.111, port)' to connect Lobby-server

8. Policy-server send policy packet.

9. connect Lobby-server and then... make room and play.

TEST 2
1. It is same test flow. but server's IP address is different.

2. 'Policy-server' + 'Login-server' locate on 111.111.111.111
3. 'Policy-server' + 'Lobby-server' locate on 111.111.111.222
4. " load webplayer -> Policy-server -> Login-server " is success.
5. and then IP is change 111.111.111.111 -> 111.111.111.222
6. policy-server-> Lobby-server is fail.
"SecurityException: Unable to connect, as no valid crossdomain policy was found"*

"TEST-1" is success. (no problem)
"TEST-2" is fail.

I have a question.
If server's IP is different, what can adjust crossdomain policy ?

Thank you for read my question :)