Getting Started with IIS8

 I try to run our application on IIS8 / Windows Server 2012.

But I face this error when I try to open the web application before the login page is displayed:

[NullReferenceException:

System.Web.HttpApplication.GetFactory(String type) +16

System.Web. MaterializeHanderExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() + 374

System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) + 287

.Net Version is 4.0.30319 

Can anybody help me out?

Thanks in advance!