I am having issues running umbrco 4.6 on IIS 6 as a ASP.NET 4.0 app. I'm getting intermittent 404 errors on the default page. I have found some info online about this issue having to do with the 4.0 framework on IIS 6. However, I cannot resolve it.

I had to comment out this entire section in the web.config file to get the site to run in 4.0 -

<

sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>

<

sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

<

section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>

<

section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>

<

section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>

<

section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>

</

sectionGroup>

I would like to run my site as a ASP.NET 2.0 app but can't get that to work either.

In the web.config I removed the following:

• <compilation targetFramework = "4.0"

• <

   

  httpRuntime requestValidationMode="2.0"

They cause config errors. Then I get this error:

Could not load file or assembly 'App_Browsers' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

I also cannot build my site in Visual Studion without gewtting the same error.

How can I run my site not as a 4.0 app?