Error in initiating a conversation for PIP3A4

I am using 6.1 and when i try to initiate the conversation for PIP3A4 follwing error is shown in the server log.

Broker Transport:WnD3_OJw6U6o+sdXV_y8Sy
nTmRs__ScCorrelationSample.Design_Server_trigger unable to unsubscribe to Broke
r Document ScCorrelationSample.Documents:inputDoc2. Exception Unknown Document T
ype (226-1490): Document type 'wm::is::ScCorrelationSample::Documents::inputDoc2
’ is not defined in the Broker.