Getting 403 forbidden error by clicking on RadMenu

[Teja]

Hi,

I am getting
403 - Forbidden: Access is denied.

You do not have permission to view this directory or page using the credentials that you supplied.

when clicking on one Rad Menu sub item then immediately click (means with in loading that tab details) on another Menu header tab item.
For Header items i declare NavigateURL="#".
in IE only  i got this error
please give quick solution for this.
attachment contains issue with screenshot

[Andy Green]

Do you have security trimming turned on? If so either give access to the user or remove the web.config from the folder containing the problem pages.

Andy