Not able to start NAV Server : Error 1053

Hi,

After installing Nav 2009 Demo installation, we are not able to start the Nav Server service. It gives the following error,
“Error 1053: The Service did not respond to the start or control of request in a timely fashion”

Server Details:,
OS: Windows 2008 R2 (64 bit). Note: -T6416 flag is set in the SQL
SQL Server 2005
.Net framework 3.5.1

Please suggest. Thanks in advance.

regards,
Vikas