I get following exception when I added code for forced rtp proxy is ser.cfg. I am using sip communicator as user agent.

net.java.sip.communicator.media.MediaException: Incorrect SDP data!
at net.java.sip.communicator.media.MediaManager.openMediaStreams(MediaManager.java:307)
at net.java.sip.communicator.SipCommunicator.callStateChanged(SipCommunicator.java:758)
at net.java.sip.communicator.sip.Call.fireCallStatusChangedEvent(Call.java:250)
at net.java.sip.communicator.sip.Call.setState(Call.java:156)
at net.java.sip.communicator.sip.CallProcessing.processAck(CallProcessing.java:566)
at net.java.sip.communicator.sip.SipManager.processRequest(SipManager.java:1532)
at gov.nist.javax.sip.EventScanner.deliverEvent(EventScanner.java:204)
at gov.nist.javax.sip.EventScanner.run(EventScanner.java:352)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.sdp.SdpParseException: Could not parse message
at javax.sdp.SdpFactory.createSessionDescription(SdpFactory.java:114)
at net.java.sip.communicator.media.MediaManager.openMediaStreams(MediaManager.java:302)
... 8 more

Please help me resolve this problem

Thanks
Rajesh