Question : Error creating a maintenance job

I am trying to create a backup job but am getting an error every time. I'm running SQLServer 2005 Standard.  The error message is:

Create failed for JobStep 'Subplan'.  [Microsoft.SqlServer.MaintenancePlanTasks]
An execution occurred while executing a Transact-SQL statement or batch [Microsoft.SqlServer.ConnectionInfo]
The specified '@subsystem' is invalid (valud values are returned by sp_enum_sqlagent_subsystems) [Microsoft SQL Server Error 14234]

Can anyone tell me how to get past this.  The steps I followed to get this message are:

1. Ran Maintenance Plan Wizard
2. Name was set to test, using windows authentication
3. Checked "Back Up Database [Full]
4. Checked the database I want to backup, left backup folder as default

Answer : Error creating a maintenance job

Reference at http://support.microsoft.com/kb/909036/en-us
Says the same thing: Install SSIS.