IDoc_AAE Adapter error

Hi Experts,

We are having issues with the sender IDoc_AAE adapter. We have AEX installed.

Have followed:

http://scn.sap.com/community/pi-and-soa-middleware/blog/2010/10/21/pixi-pi-73-new-java-based-idoc-adapters-configuration-sender-receiver--teaser

http://scn.sap.com/people/william.li/blog/2011/05/04/configuring-pi-730-java-idoc-adapter

error when i start the adapter is:

Could not start communication channel due to an internal error

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Successfully connected to system DEV as user XXXXX

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Please provide ur valuable input.

--

rgds

Shubhnam Singh