SqlServerAgent error: an attempt made to send a email when no email session has been established.
LiteSpeed uses SQL Server's Database Mail functionality. The Database Mail must be setup on the server prior to LiteSpeed's access.
You can setup Database Mail, either by using the stored procedures that are included with SQL Server 2005 or by using SQL Server Management Studio.
If you need assistance setting up database mail, see: http://www.mssqltips.com/tip.asp?tip=1100