The Statistics Portal repeatedly requests logon credentials even though permissions are in place
Internet Explorer Enhanced Security is enabled and preventing the Statistics from being displayed.
For Windows Server 200x
-Open Control Panel, click Add or Remove Programs, and then click Add/Remove Windows Components.
-Select Internet Explorer Enhanced Security Configuration, click to clear the selection, and then click OK.
-Click Next, and then click Finish.
-Restart Internet Explorer to apply the changes.
For Windows 2008,
-Start "Server Manager"
-Under the "security information section, click on the Configure IE ESC" link and
change the radial buttons to "Off" for both Users & Administrators.