[SR-Users] Question about in call both side redirection

Hello (sorry for my bad english) - i try to create voice record service by request. User A call to user B. In call by pressing combination like *55 Kamailio must redirect both sides to asterisk, whitch create dynamic conference room with recording. As i understand i need to use dlg_refer() from dialog module, but in log file i get: Konsole output Sep 4 10:45:14 voipc-node2 /usr/local/sbin/kamailio[18941]: ERROR: dialog [dlg_req_within.c:85]: build_dlg_t(): no contact available Sep 4 10:45:14 voipc-node2 /usr/local/sbin/kamailio[18941]: ERROR: dialog [dlg_transfer.c:188]: dlg_refer_callee(): failed to create dlg_t

In script i try to refer with: dlg_refer("callee", "sip:100@10.10.9.209"); dlg_refer("caller", "sip:100@10.10.9.209");