The handlers prototype.ashx, core.ashx, converter.ashx, and SWIRL.DNN.Modules.ChatRoom.AJAXMethods,SWIRL.DNN.Modules.ChatRoom.ashx are producing the following error when I load a page with a chat room module:

[NullReferenceException: Object reference not set to an instance of an object.]
   DotNetNuke.Security.Authentication.Configuration.GetConfig() +15
   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

It seems that this could be related to Windows authentication.