解决。 IIS6不承认＆LT; system.webServer＆GT; （它在IIS7介绍），我用＆LT;的HttpModules＆GT; 在＆LT;＆的System.Web GT; 而不是：

Solved. IIS6 does not recognize <system.webServer> (it was introduced in IIS7), and I used <httpModules> in <system.web> instead:

<system.web>
...
<httpModules>
<remove name="RoleManager" />
</httpModules>
...
<system.web>