HI,
When we try to install a new instance by MS Sql server 2005. Server contains already three instances and we are trying to install the new instance it is pop-ups a error message " The Unattended installation Failed " With the Return code : 18456 Installation Step: SQL Server - build 9.00.1399 , kindly help us to resolve the problem.
Server Configuration: Windows Server 2003 64-Bit
Microsoft SQL Server 2005
Already three instances has been installed.
Regards
Gopinath M.L