SoSSE 7.0.1 alerts on the following error...
Here are a few common reasons for this error to occur:
1. The monitored server has been restarted, this will close the existing connections (see SQL Server log)
2. Someone or something has killed the Spotlight SPID that is being used.
3. There is a failover (in a mirror setup for example) again, take a look in the SQL Server log.