Hi, I have installed DNN and it's working fine. I am planning to use DNN as a corporate portal for my organization.

Hence, I have to incorporate a lot of e-forms developed into DNN. I think the only way to do that is by creating iframe and call my own developed .net application in it.

Therefore, after creating an iframe, I use to call my application with an URL address like below:

 

Source: The URL of the document to show in the iframe	Link Type: URL ( A Link To An External Resource ) File ( A File On Your Site ) Location: ( Enter The Address Of The Link ) Select An Existing URL

The URL:

http://portal.company.com/Portaldnn/asps_new/people/xxx.aspx

This way was working fine earlier, but after I change the authentication method of DNN to be windows authentication, I started getting the following error message. Could someone help me PLEASEEEEE!

Server Error in '/PortalDnn' Application.

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]    DotNetNuke.Security.Authentication.Configuration.GetConfig() +16    DotNetNuke.HttpModules.AuthenticationModule.OnAuthenticateRequest(Object s, EventArgs e) +25    System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42