Error message is here http://www.tiikoni.com/tis/view/?id=cf8b88d 
I have read tons of threads about this error but none solved my issue
1) server is win 2008 + iis7
2) Windows authentication has been enabled and it is the only one enabled also this feature has been verified installed
3) Negotiate, NTML is Anuthentication Provider
4) I give root folder a everyone every access permission
5) my browser uses proxy, but I have tried no use proxy I still get the same error
6) I did enable tracing rule and I get a warning
Error Tracing Warning Message
http://www.tiikoni.com/tis/view/?id=5e2f51c
In error page 'Links and More Information' part,
here is something I do not understand. It says
"..... verify which ...

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