Internet Information Services 7.0
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- Start Internet Services Manager. 
 - Click Default Web Site, and then click Properties. 
 - Double-click ASP in the Features pane. 
 - Expand Behavior. 
 - Click Enable Parent Paths. 
 - Click True for Enable Parent Paths. 
 - Click Apply. 
 
Internet Information Services 6.0 
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- Open the Internet Services Manager in the Microsoft Management Console (MMC). 
 - Right-click on your Default Web Site and select Properties. 
 - Click the Home Directory tab. 
 - Click the Configuration button. 
 - Click the App Options tab. 
 - Click to select the Enable Parent Paths checkbox. 
 - Click the OK button until you return to the MMC.