Issue in Conference with PJSIP, SIPEKSDK and FreeSWITCH

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What steps will reproduce the problem?
1. Installed FreeSWITCH SIP server with IP 192.168.0.1 with extension 1000 to 
1019
2. Downloaded the latest pjsipDll.dll and SipekSdk.dll from trunk and developed 
a sample softphone as per the tutorial in the sipek website
3. Registration is successful for extension 1002 in my PC with IP 192.168.0.2
4. I am testing the conference by calling the first number by 
CallManager.CreateSmartOutboundCall()
5. Put the first call on hold once it's active
6. Call the second number
7. Put the calls on conference once the second call gets active

What is the expected output? What do you see instead?
In conference each party should hear voices of other 2 parties. But I am able 
hear voices of both the parties and similarly vice versa. But, Party 1 is not 
able to hear Party 2 and similarly vice versa

What version of the product are you using? On what operating system?
Latest pjsipDll.dll and SipekSdk.dll from trunk, Windows XP Professional, SP3. 
Microsoft Visual Studio 2008 for creating the softphone.

Please provide any additional information below.
FreeSWITCH is installed in Cent OS 5.2 and the conference is working fine when 
i use x-lite softphone.

Original issue reported on code.google.com by rajesh.n...@gmail.com on 8 Jul 2010 at 10:09