Hello,

I'm trying to find how change the default user type.

Cause i deleted the user type writer and when i'm trying to connect to an user by active directory.

I think it tries to add it to the user type writer. He can't and i got this error.

Object reference not set to an instance of an object.

[NullReferenceException: Object reference not set to an instance of an object.]
   umbraco.BusinessLogic.User.MakeNew(String name, String lname, String passw, String email, UserType ut) +223
   umbraco.cms.presentation.login.ActiveDirectoryMapping(String loginName, String email) +49
   umbraco.cms.presentation.login.Button1_Click(Object sender, EventArgs e) +382
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

thank you in advance.