i have purchase windows small business server 2008 premium so microsoft provide media disk 

win server 2008 standard 32bit/64bit

win server 2008 small bussiness rco 32bit/64 bit

sql server 2005 32bit/64bit

sql server 2008 32bit/64 bit 

then i am loading server 2008 standard 64 bit and activated .then try to load sql server 2008 standard edition. not install shwing error massage os not supported .

then i am format server and then load win server 2008 small bussiness rco  then check so exchange server 2007 & sql server 2005 express edition & wsus server , sharepoint install automatically . but i want to only install win server 2008 standard edition server & sql server 2008 standard edition it is possible or not pls help me

Fairly sure that version of SQL is tied to SBS2008, ie: the server it is installed on has to be a member of the SBS domain before the install will work.  

Hi:

Indeed you must have a SBS 2008 in the domain to install the Premium version of SQL.  What most folks did was install Server 2008 on the metal with ONLY hyper v role, then create two VMs, one for SBS and one for the SAME copy of Server 2008 and  installed SQL on that VM.  In effect you get two servers, one SBS and one Standard, and SQL all on one physical machine.

thank  Larry for replay & explain details SBS 2008 server