ABAP Proxy Sync scenario with error No Implementing class registered error

I am working in a ABAP proxy to Proxy scenario. The connectivity is between SEM and PI systems(SEM->PI->SEM). Outbound synchronus interface is used to create proxy (Client Proxy) its a SAP standard interface. This scenario is configured as below,
1) Sender and receiver business system is the same for SEM with same client.
2) No Message and Interface mapping is used.
Please let me know, if the configuration is correct. if then, how to solve this error?
Regards,
User PI.

>>The connectivity is between SEM and PI systems(SEM->PI->SEM).
SEM->PI->SEM makes no sense. Why do you need PI here?
Any way, the error message implies the server proxy is not implemented (or activated) correctly.

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Valuable inputs..
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> Change Global configuration data
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ABAP Server Proxies (Inbound Proxy)
/people/siva.maranani/blog/2005/04/03/abap-server-proxies
OutBound Proxy (Client Proxy)
/people/sravya.talanki2/blog/2006/07/28/smarter-approach-for-coding-abap-proxies
Outbound Proxy (Client Proxy)
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
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/people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies
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http://help.sap.com/saphelp_nw2004s/helpdata/en/48/d5a1fe5f317a4e8e35801ed2c88246/frameset.htm
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https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/abap%2bproxy%2boutbound%2bprogram%2b-%2bpurchase%2border%2bsend
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When I send a test message from runtime workbench, it shows up in sxmb_moni as a green flag, clicking in the message I see the following error
<Trace level="1" type="B" name="CL_XMS_MAIN-WRITE_MESSAGE_TO_PERSIST" />
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</SAP:Trace>
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(ABAP interface, request message ..........)
I then check to ensure the proxies are still active along with the class and they are. I also ready about checking the rfc H connection via sm59 and doing the connection test I received a 500 empty HTTP Response which is good?
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<Trace level="1" type="T">--no sender or receiver interface definition found</Trace>
<Trace level="1" type="T">Hence set action to DEL</Trace>
Check these:
Re: Moni Issue
no interface found
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<b>Hi
I am executing an Out bound proxy from client 101.
when i execute the proxy, i could see the following error in moni.
error info----
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http://help.sap.com/saphelp_nw2004s/helpdata/en/86/58cd3b11571962e10000000a11402f/frameset.htm
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Hello,
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Go to SXMB_ADM.
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Proxy calls are not permitted on sender or receiver side on the IS (client)</SAP:Stack>
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>
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ABAP Proxy Sync scenario with error No Implementing class registered error

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