KB941409 has been released : http://support.microsoft.com/kb/941409/en-us
This discusses and issue which has led to numerous calls to Microsoft CSS. Since the Operations Manager task subsystem relies upon the SQL Broker being enabled, any task will fail if the broker is disabled.
When you run the Discovery Wizard in Microsoft System Center Operations Manager 2007, the wizard may stop responding (hang). This behavior typically occurs in the "Discovery Progress" section of the wizard. Additionally, the following event may be logged in the Operations Manager log:
Event Type: InformationEvent Source: Health Service ModulesEvent Category: None Event ID: 11553Date: DateTime: TimeUser: N/AComputer: Management_server nameDescription: Computer verification summary event.Verification successes - 2Verification failures - 0 Verification time elapsed - 3 seconds
This issue may occur if Microsoft SQL Server Service Broker is not running on the management server.
To resolve this issue, enable SQL Server Service Broker. To do this, follow these steps:
1.Start SQL Server Management Studio.
2.Click New Query.
3.In the navigation pane, expand Databases, and then click OperationsManager.
4.In the details pane, type the following command, and then click Execute:
SELECT is_broker_enabled FROM sys.databases WHERE name = 'OperationsManager'
5.In the results that are displayed, verify the value that is displayed in the is_broker_enabled field. SQL Server Service Broker is disabled if this value is 0 (zero).
6.In the details pane, type the following command, and then click Execute:
ALTER DATABASE OperationsManager SET ENABLE_BROKER
SQL Server Service Broker is now enabled.
7.Close all open windows and dialog boxes.
8.Test the Discovery Wizard in System Center Operations Manager 2007.
System Center Operations Manager 2007 depends on SQL Server Service Broker to implement all task operations. If SQL Server Service Broker is disabled, all task operations will be affected. The resulting behavior may vary according to the task that has been initiated. Therefore, it is important to check the state of SQL Server Service Broker whenever unexpected behavior is observed around a task in System Center Operations Manager 2007.