[Serusers] second mediaproxy on another network, not working

I have successfully installed ser and mediaproxy on my network, it is a /27. Now to load balance I installed a second mediaproxy server on a datacenter, so on another network. I configure dns and the mediaproxy.ini (on the new server) to work with the new ip address. I disbaled all firewall rules to test the proxy. But it didn't work, the call is established but no rtp flow between the ua and mediaproxy. This is the debug from the dispacher: Jun 17 18:10:32 voip proxydispatcher[26275]: command request 493086ee-17262f1a(a)10.254.0.42 10.254.0.42:16440:audio 213.178.216.33 voadsl.italycomnet.it local 213.178.208.130 remote Sipura/SPA2100-3.1.3 info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag: Jun 17 18:10:32 voip proxydispatcher[26275]: forwarding to mediaproxy on voicegw-mi.italycomnet.it:25060: got: '213.178.208.130 35006' Jun 17 18:10:32 voip proxydispatcher[26275]: command execution time: 289.48 ms Jun 17 18:10:32 voip proxydispatcher[26275]: command lookup 493086ee-17262f1a(a)10.254.0.42 213.178.208.130:13308:audio 213.178.208.130 voadsl.italycomnet.it local voadsl.italycomnet.it unknown Asterisk=20Italycom=20Mix info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag:as58d31ab2 Jun 17 18:10:33 voip proxydispatcher[26275]: forwarding to mediaproxy on voicegw-mi.italycomnet.it:25060: got: '213.178.208.130 35006' Jun 17 18:10:33 voip proxydispatcher[26275]: command execution time: 183.21 ms Jun 17 18:10:40 voip proxydispatcher[26275]: command lookup 493086ee-17262f1a(a)10.254.0.42 213.178.208.130:13308:audio 213.178.208.130 voadsl.italycomnet.it local voadsl.italycomnet.it unknown Asterisk=20Italycom=20Mix info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag:as58d31ab2 Jun 17 18:10:41 voip proxydispatcher[26275]: forwarding to mediaproxy on voicegw-mi.italycomnet.it:25060: got: '213.178.208.130 35006' Jun 17 18:10:41 voip proxydispatcher[26275]: command execution time: 175.07 ms Jun 17 18:10:46 voip proxydispatcher[26275]: command delete 493086ee-17262f1a(a)10.254.0.42 info= Jun 17 18:10:46 voip proxydispatcher[26275]: forwarding to mediaproxy on voicegw-mi.italycomnet.it:25060: got: '' Jun 17 18:10:46 voip proxydispatcher[26275]: command execution time: 191.27 ms this is the debug from the mediaproxy server: Jun 17 18:10:32 voicegw-mi mediaproxy[4213]: command request 493086ee-17262f1a(a)10.254.0.42 10.254.0.42:16440:audio 213.178.216.33 voadsl.italycomnet.it local 213.178.208.130 remote Sipura/SPA2100-3.1.3 info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag:,dispatcher Jun 17 18:10:32 voicegw-mi mediaproxy[4213]: session 493086ee-17262f1a(a)10.254.0.42: started. listening on 213.178.208.130:35006 Jun 17 18:10:32 voicegw-mi mediaproxy[4213]: command execution time: 1.61 ms Jun 17 18:10:33 voicegw-mi mediaproxy[4213]: command lookup 493086ee-17262f1a(a)10.254.0.42 213.178.208.130:13308:audio 213.178.208.130 voadsl.italycomnet.it local voadsl.italycomnet.it unknown Asterisk=20Italycom=20Mix info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag:as58d31ab2,dispatcher Jun 17 18:10:33 voicegw-mi mediaproxy[4213]: command execution time: 0.56 ms Jun 17 18:10:33 voicegw-mi mediaproxy[4213]: session 493086ee-17262f1a(a)10.254.0.42: called signed in from 213.178.208.130:13308 (RTP) (will return to 213.178.208.130:13308) Jun 17 18:10:33 voicegw-mi mediaproxy[4213]: warning: Received packet from a third party: 213.178.216.2:16440 Jun 17 18:10:40 voicegw-mi mediaproxy[4213]: command lookup 493086ee-17262f1a(a)10.254.0.42 213.178.208.130:13308:audio 213.178.208.130 voadsl.italycomnet.it local voadsl.italycomnet.it unknown Asterisk=20Italycom=20Mix info=from:prova@voadsl.italycomnet.it,to:0828720607@voadsl.italycomnet.it,fromtag:56eac4de28c789eao0,totag:as58d31ab2,dispatcher Jun 17 18:10:40 voicegw-mi mediaproxy[4213]: command execution time: 0.18 ms Jun 17 18:10:46 voicegw-mi mediaproxy[4213]: command delete 493086ee-17262f1a(a)10.254.0.42 info=dispatcher Jun 17 18:10:46 voicegw-mi mediaproxy[4213]: session 493086ee-17262f1a(a)10.254.0.42: 0/646/0 packets, 0/38760/0 bytes (caller/called/relayed) Jun 17 18:10:46 voicegw-mi mediaproxy[4213]: session 493086ee-17262f1a(a)10.254.0.42: ended. Jun 17 18:10:46 voicegw-mi mediaproxy[4213]: command execution time: 0.42 ms Jun 17 18:11:52 voicegw-mi sshd(pam_unix)[4228]: session opened for user root by root(uid=0) Seems that is not able to find the right pubblic address of the ua.... Any help is appreciated. Thanks Rosario