Cannot find MSRP session

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What steps will reproduce the problem?

1.Share content from Audio/Video call screen (ScreenAV.java).

What is the expected output? What do you see instead?

File sharing is not done between two two devices and between two AVDS.
Instead of that i get error in Log cat as 

E/org.doubango.imsdroid.Screens.ScreenFileTransferView(335): Cannot find MSRP 
session with id=29

I successfully done Audio and Video call in both devices and AVDS(Android 
Virtual Devices).
But Do not able to do File transfer.OR generate MSRP session.

For MSRP which fields i want to change in Options(Setting).
I follow steps as per below link.
http://code.google.com/p/imsdroid/wiki/sip2sip_info

What version of the product are you using? On what operating system?

I use SIP accounts of sip2sip.info
IMSDroid version=2.0.484
doubango_revision=687
NGN version=2.0 

Please provide any additional information below.

What thing I missing to get File Transfer and Chat to work in IMSDroid?
Please guide me to solve this issue.

Original issue reported on code.google.com by android....@gmail.com on 24 Apr 2012 at 8:28

khaledaljorreshy1993 / imsdroid

Cannot find MSRP session #342