SYMPTOMS
When you do the Microsoft Forefront Threat Management Gateway setup you receive error when you want to click on "Add" network address range button :
Log Name: Application
Source: MsiInstaller
Event ID: 1013
Task Category: None
Level: Error
Keywords: Classic
Product: Microsoft Forefront Threat Management Gateway -- Setup failed while attempting to display the dialog box used to define the Internal network.
CAUSE
If you change default installation components the application crash.
SOLUTION
Install all options.