couldn't find SqlServeratbase in add new item

hey guys
when i chose add new item to add new sql server database, i couldn't find that option
i only found:-

local database .sdf (thats for sql compact)
service-based database .mdf (i thought thats it but when i chose this one an error appeared) "failed to generate an instance etc....."

where's the sql server database ITEM?????:confused: :confused: :confused:

i have VS 2008 Professional & Sql server 2005 express edition(which comes with the installation of VS 2008)