Seeburger AS2 Adapter error

Hi,
  I'm trying to test AS2 connection with External system and got some errors.
  I'm able to send message successfully to the external system with MDN Mode Synchronus with out any errors and got the MDN back, I changed the MDN mode to Asynchronus and got the below error. Do we need to do any extra configuration for Asynchronus mode MDN?
Waiting for your valuble suggestions.
Error message : Error in unkown channel: (No session available) >> Error type: COMMUNICATION_ERROR >> Error date: 9/23/10 2:19 PM >> Description: 500 - Internal Server Error: Error while handle incoming request: java.lang.NullPointerException: while trying to invoke the method java.lang.String.toUpperCase() of an object returned from com.seeburger.as2.tasks.result.MDNDecomposerResult.getMdnOriginalMessageID() [9/23/10 2:19 PM]
Thanks,
Kishore

Hi,
  Sorry for the late reply.
  Receipt Delivery Address : Enter the URL of yr own AS2.
  Yes, I specified our AS2 address as http://xxxx:50000/SeeburgerAS2/AS2Server
  Time Out: What you have given.
  10 min
  In case of asynchronous MDN mode, an Report channel and Sender agreement always have to be configured also when u201CRefer to XI systemu201D is disabled
Yes, I have created Sender agreement and Sender communication channel with Message protocol as Reports.
Thanks,
Kishore

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