Symptoms
Users Can't Load tasks using K2 Webpart (SmartForms Worklist Control)
Diagnoses
No tasks are displayed using the SmartForms Viewer Web Part containing a Form with the Worklist Control.
Resolution
There is a known issue with the SmartForms Control Pack 1.0 Worklist Control when the Web Service URL environment field gets re-created and it loses the connection and doesn't show the tasks. There is a script that needs to be executed in order to fix the link between the Environment Field and the GUID.