Symptoms
When browsing to a Viewflow URL, Silverlight continuously spin and does not render the Viewflow:
https://k2.denallix.com/viewflow/viewflow.aspx?processid=205
Diagnoses
When building the Viewflow URL manually, the letter casing of the 'ProcessID' parameter needs to be taken into account.
https://k2.denallix.com/viewflow/viewflow.aspx?ProcessID=205 [WORKS]
https://k2.denallix.com/viewflow/viewflow.aspx?processid=205 [DOES NOT WORK]
http://stackoverflow.com/questions/24699643/are-query-string-keys-case-sensitive
Resolution
Changing the parameter to 'ProcessID' (case-sensitive) resolved the issue.