[Serusers] multiple bye problem closing a call from sip client behind NAT

I have ser.cfg config prettty similar to the getting started guide, using mediaproxy for natted client. The only problem that iam going to have is that when i close a call fromm a client behind NAT i get multiple bye message: 117.088293 83.211.248.158 -> 195.6x.19x.4x SIP/SDP Status: 200 OK, with session description 117.263313 195.6x.19x.4x -> 83.211.248.158 SIP Request: ACK sip:0681140017@83.211.248.158:61421 120.286678 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 120.455192 195.6x.19x.4x -> 83.211.248.158 SIP Status: 200 OK 120.784615 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 120.793092 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK 121.783765 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 121.793036 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK 123.783061 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 123.793280 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK 127.783147 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 127.843088 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK 131.782153 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x 131.791851 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK 135.388829 195.6x.19x.45 -> 83.211.248.158 UDP Source port: 5060 Destination port: 61421 Seems that the 200 Ok is not hittng the client but I don't know how to fix this in ser.cfg Please help. Regards