Error when try to install SQLAssistantWeb12.0

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Error when try to install SQLAssistantWeb12.0

I config IIS7 follow picture IIS.jpg (File Attachments) and when I install SQLAssistantWeb12.0 I get error in picture errorSQLWeb.jpg (File Attachments)

How to config IIS7 on Windows Vista before install SQLAssistantWeb12.0 ?