[Freeswitch-users] 0.0.0.0 reinvite in SDP

HI, I am having one issue with music on hold. A calls B (B is at different voip provider that is using netcentrex softswitch), after B do xfer it puts A on hold and send reinvite with 0.0.0.0 in sdp, when C try to pickup this call, just different music on hold appears but there is no media from C. how to deal with this issue? tnx! miha