[Serusers] REGISTER msg fork

Hello, i've been trying to fork the same REGISTER message to two separete SIP proxies with: if(message == "REGISTER" && uri=~"sip:my_first_proxy") { append_branch("sip:my_second_proxy"); } also tried with: if(message == "REGISTER" && uri=~"sip:my_first_proxy") { seturi("sip:my_first_proxy"); forward(uri:host, uri:port); seturi("sip:my_second_proxy"); forward(uri:host, uri:port); break; } but neither case works. Registration request is forwarded only for the first proxy. It seams that seturi() and other uri rewriting functions doesn't affect REGISTER uri? What could we other solution for such situation? Antanas NTT