When you disable event firing, it should not be kept disabledhttp://blogs.technet.com/b/sharepointdevelopersupport/archive/2012/06/07/when-you-disable-event-firing-it-should-not-be-kept-disabled.aspxThis post is a contribution from Nishand Vasudevan, an escalation engineer with the SharePoint Developer Support team. Disabling the event receivers can stop the workflow events.  For example, disabling the event can stop workflow from starting anden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)