Error while using the SAP XI Adapter

I am using the SAP XI adapter and i have defined the Outbound Service Associations
while calling the service pub.xi.Router:outboundMessageObject i am getting the below error.

Error Description :
[B2B–XI.0005.9084] XI Router: OutboundMessageObject Exception: [B2B–XI.0005.9013] XI Router: There was a problem in the SystemMap: SystemMap: [B2B–XI.0005.9033] XI Router: There is no endpoint assigned to this service.

Any Idea where the issue might be ?