Do you have the Exception about Activity or Event Esacalation Event use mail template.
When server run the Escalation the process 's status to Error.
In the Workspace's Error logs can see can't load the System.DateTimeOffset library.
This seem the Linq in Framework3.5
I try the 0807 330/350 all fail.
But when i install the framework 3.5 sp1 ,i find the process is run correct.
In blackpearl document isn't support orcase or vs2008.