Error reading/setting ApplicationHost setting

I get this error

error '80070005'

when I try to run this snippet of code

    Set adminManager = CreateObject("Microsoft.ApplicationHost.WritableAdminManager")
    adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST/SITE_NAME/"
    Set aspSection = adminManager.GetAdminSection("system.webServer/asp","MACHINE/WEBROOT/APPHOST/SITE_NAME/")
    Set limitsElement = aspSection.ChildElements.Item("limits")
    limitsElement.Properties.Item("maxRequestEntityAllowed").Value = 2147483647
    Set limitsElement = aspSection.ChildElements.Item("requestLimits")
    limitsElement.Properties.Item("maxAllowedContentLength").Value = 2147483647
    Response.Write limitsElement.Properties.Item("maxRequestEntityAllowed").Value & "<br />"
    Response.Write limitsElement.Properties.Item("maxAllowedContentLength").Value & "<br />"

    adminManager.CommitChanges()

The error occurs in this line:

Set aspSection = adminManager.GetAdminSection("system.webServer/asp","MACHINE/WEBROOT/APPHOST/SITE_NAME/")

I am running on W2008 with IIS 7 with both ASP Classic and ASP.NET installed