User not authenticated after launching file browser window

Hello -

I am encountering an issue where CheckAuthentication is returning false because the user is not authenticated when this callback occurs. This only seems to occur when using the FCKEditor sample, not the standalone sample. This indicates that the issue lies somewhere in the launching of the file browser window. The code in my CheckAuthentication is as follows:

return HttpContext.Current.User.Identity.IsAuthenticated (ASP.NET)

I am simply trying to run the samples at this point. Both the standalone & fckeditor samples work on my test server but only the standalone works on my production server. Has anyone seen this? Any suggestions?

Regards,

jd98