[OpenSER-Users] Handling re-INVITES --hellp required

Hello all, i have users one is on global ip and another behind NAT am using asterisk as media server leg 1: caller : Global ip UAC. callee: asterisk leg2: caller :asterisk callee: NATed UAC. sdp of NATed client is handled at openser reply route at first stage when asterisk re-invites the NATed UAC to bridge the two call-Leg's the sdp from NATed UAC is not changed ,, even if i call t_on_reply in the loose route section of the script.. it is still showing privat ip so finally after 2 or 3 sec's there was an end to the dialog can anybody have any idea to handle re-invite's 200 ok SDP mangling? please help me out.. Thanks in advance regards srinivas -- Srinivas Antarvedi