title: Write to Event log from BizTalk
body: <p>When I try to execute an orchestration with something like <code>EventLog.WriteEntry("MyEsb", "Msg");</code> in Expression shape, I get the exception <code>The source was not found, but some or all event logs could not be searched.  To create the source, you need permission to read all event logs to make sure that the new source name is unique.  Inaccessible logs: Security.</code> Why?
  I'm running Win 7 64bit if this makes any sense.</p>