Hi,

i have had DNN installed for over 2 years i upgraded to the latest version 3 months ago and everything was working fine. all of a sudden i am getting this error

Error: Windows Authentication is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: StartIndex cannot be less than zero. Parameter name: startIndex ---> System.ArgumentOutOfRangeException: StartIndex cannot be less than zero. Parameter name: startIndex at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy) at DotNetNuke.Security.Authentication.Configuration..ctor() at DotNetNuke.Security.Authentication.Configuration.GetConfig() at DotNetNuke.Security.Authentication.AuthenticationController..ctor() at DotNetNuke.Modules.Authentication.AuthenticationSettings.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---

i created another portal to see if i would get the error the BUT i did not. Can anyone help in fixing the the problem.

Thanks Stuart

i had also had a link for those on the intranet to log in without typing the credentials which dose not work either.

http://Site/admin/Security/WindowsSignin.aspx

the rest of the site seems fine.

DNN 4.3.5

Stuart