Custom adapter module

Hi, My requirement was to call 2 webservices in a row, First one to post the data by using a unique session id value and second is to close the call by passing same session id. I used custom adapter module to call the second webservice and calling it in module section of SOAP receiver channel which is calling the first web service.

In processing sequence I am calling the custom module (i.e. CallLogout) after standard SOAPadapterBean entry (i.e. sap.com/com.sap.aii.af.soapadapter/XISOAPAdapterBean), As shown below -

With this, I am getting an error in adapter engine - java.lang.NullPointerException: while trying to invoke the method com.sap.engine.interfaces.messaging.api.MessageKey.getMessageId() of an object loaded from local variable 'msgKey';

The moment I change the sequence, and call my custom adapter before standard soapadapterBean entry, the module call works fine. However it does not fit to my requirement because I need to call logout service only after soap adapter service call.

My question is - Can we use MessageKey after calling standard adapter bean. If not, is there a way I can make it working. Below is an extract of my code where I am using MessageKey for auditlog -

amk = new MessageKey(msg.getMessageId(), msg.getMessageDirection());
Audit.addAuditLogEntry(amk, AuditLogStatus.SUCCESS,                    "Source XML parsed succesfully");

Thanks,

Amol