Dynamics NAV 2013 Web Client Error In Server 2012 (IIS 8.0)

Hello Master,
I facing some issue in Windows Server 2012 with SQL Server 2012 ( IIS 8.0)

When i run RTC no problem.
Only Error when i connect Web Client is cause the issue.
Kindly refer to attached file.

For the Something when i install to Windows Server 2008 R2 and SQL 2008 R2 (IIS 7.0) no issue.

Hope master here can guide me how to solve it.
Thanks

regards
tony