rbos3, yes i tryed install all this products step-by-step
but simlpe instal and step-by-step instal had same error - cannot connet to DB 
also i tryed create DB/users manually by the manual of Derek - http://derek858.blogspot.com/2012/09/vmware-vcenter-51-installation-part-1.html
this manual not helped me too
Maybe it is problem of Windows Server 2012 ??