Hi Steven,
Make sure the uwl_service has the following authorizations in the backend R/3
Check the destination name has name in the format of
ABCCLNT710$WebFlowConnector
create the webflow connector.Register it.
Check the xml whether the Task mentioned in SWFVISU are coming in the xml.
For each user assign roles SAP_BC_UWL_SERVICE and SAP_BC_UWL_END_USER.
Thanks,
Aashima